Collection: Bearings - Single Row Ball

Bearings -> Single Row Ball
ID (d) O.D. (D) Width (B) Inner Ring Width (Bn) Flange Diameter (DF) Flange Width (BF) Indicative
Image
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: Abec 5   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZS-MC34-GR5-R-G48 (PK-22)
Out of Stock | Backorder Now | Backorder now for delivery around Mon, Aug 03, 2026
Regular price $1,142.41 AUD
Regular price Sale price $1,142.41 AUD
Priced, Stocked and Sold Per 22 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d) O.D. (D) Width (B) Inner Ring Width (Bn) Indicative
Image
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: Abec 5   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZS-MC34-GR5-R-G48 (PK-22)
Out of Stock | Backorder Now | Backorder now for delivery around Mon, Aug 03, 2026
Regular price $1,142.41 AUD
Regular price Sale price $1,142.41 AUD
Priced, Stocked and Sold Per 22 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.004
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: Abec 7   
Category: Bearings - Single Row Ball - Unflanged
Double shielded Abec 7 precision stainless steel bearing with low-torque ribbon retainer. Band around OD is a manufacturers precision marker.
Part Number: S684A-ZZS-MC34-GR7-R-G48 (Each)
2 Available Now | Further orders can be expected around Sat, Jul 18, 2026
Regular price $47.05 AUD
Regular price Sale price $47.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 2 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.004
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: Abec 7   
Category: Bearings - Single Row Ball - Unflanged
Double shielded Abec 7 precision stainless steel bearing with low-torque ribbon retainer. Band around OD is a manufacturers precision marker.
Part Number: S684A-ZZS-MC34-GR7-R-G48 (Each)
2 Available Now | Further orders can be expected around Sat, Jul 18, 2026
Regular price $47.05 AUD
Regular price Sale price $47.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

2 Available Now. Backorder if more than 2.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Phenolic Retainer Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Phenolic Retainer Bearing
Material: Stainless Steel AISI 440C - Phenolic Retainer    Precision Grade: P5P   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZS-MC3-GR5-KC-L23 (PK-20)
Out of Stock | Backorder Now | Backorder now for delivery around Mon, Aug 03, 2026
Regular price $1,504.05 AUD
Regular price Sale price $1,504.05 AUD
Priced, Stocked and Sold Per 20 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Phenolic Retainer Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Phenolic Retainer Bearing
Material: Stainless Steel AISI 440C - Phenolic Retainer    Precision Grade: P5P   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZS-MC3-GR5-KC-L23 (PK-20)
Out of Stock | Backorder Now | Backorder now for delivery around Mon, Aug 03, 2026
Regular price $1,504.05 AUD
Regular price Sale price $1,504.05 AUD
Priced, Stocked and Sold Per 20 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684A-2RS-MC3 (Each)
173 Available Now | Further orders can be expected around Sat, Jul 11, 2026
Regular price $5.41 AUD
Regular price Sale price $5.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 173 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684A-2RS-MC3 (Each)
173 Available Now | Further orders can be expected around Sat, Jul 11, 2026
Regular price $5.41 AUD
Regular price Sale price $5.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

173 Available Now. Backorder if more than 173.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Double shielded standard bearing
Part Number: 684A-ZZ-MC3 (PK-2)
82 units (164 pcs) Available Now | Further orders can be expected around Sat, Jul 11, 2026
Regular price $5.86 AUD
Regular price Sale price $5.86 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 82 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Double shielded standard bearing
Part Number: 684A-ZZ-MC3 (PK-2)
82 units (164 pcs) Available Now | Further orders can be expected around Sat, Jul 11, 2026
Regular price $5.86 AUD
Regular price Sale price $5.86 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

82 units (164 pcs) Available Now. Backorder if more than 82.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684A-ZZ-MC3-JP6 (PK-100)
Contact Us | Special Order Only - Please contact us if you need a large quantity
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684A-ZZ-MC3-JP6 (PK-100)
Contact Us | Special Order Only - Please contact us if you need a large quantity | Backorder now for delivery around Fri, Mar 02, 2029
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
9.000
mm
Width (B)
4.000
mm
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Deleted Item. Available while stocks last.
Part Number: 684A-ZZS-ECO (PK-5)
4 units (20 pcs) Available Now | Item Discontinued - Up to 4 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $3.49 AUD
Regular price $5.89 AUD Sale price $3.49 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

4 units (20 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
9.000
mm
Width (B)
4.000
mm
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Deleted Item. Available while stocks last.
Part Number: 684A-ZZS-ECO (PK-5)
4 units (20 pcs) Available Now | Item Discontinued - Up to 4 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $3.49 AUD
Regular price $5.89 AUD Sale price $3.49 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

4 units (20 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x9x4 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.004
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Flange Diameter (DF)
10.300
Flange Width (BF)
1.000
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 7   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684A-ZZS-MC34-GR7-R-G48 (PK-50)
Out of Stock | Backorder Now | Backorder now for delivery around Mon, Aug 03, 2026
Regular price $3,158.41 AUD
Regular price Sale price $3,158.41 AUD
Priced, Stocked and Sold Per 50 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.004
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Flange Diameter (DF): 10.300    Flange Width (BF): 1.000    Precision Grade: Abec 7   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684A-ZZS-MC34-GR7-R-G48 (PK-50)
Out of Stock | Backorder Now | Backorder now for delivery around Mon, Aug 03, 2026
Regular price $3,158.41 AUD
Regular price Sale price $3,158.41 AUD
Priced, Stocked and Sold Per 50 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Flange Diameter (DF)
10.300
Flange Width (BF)
1.000
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 5   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684A-ZZS-MC34-GR5-R-G48 (PK-20)
Out of Stock | Backorder Now | Backorder now for delivery around Mon, Aug 03, 2026
Regular price $1,115.41 AUD
Regular price Sale price $1,115.41 AUD
Priced, Stocked and Sold Per 20 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Flange Diameter (DF): 10.300    Flange Width (BF): 1.000    Precision Grade: Abec 5   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684A-ZZS-MC34-GR5-R-G48 (PK-20)
Out of Stock | Backorder Now | Backorder now for delivery around Mon, Aug 03, 2026
Regular price $1,115.41 AUD
Regular price Sale price $1,115.41 AUD
Priced, Stocked and Sold Per 20 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Flange Diameter (DF)
10.300
Flange Width (BF)
1.000
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684A-ZZ-MC3-JP6 (PK-100)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Jul 11, 2026
Regular price $538.86 AUD
Regular price $1,139.76 AUD Sale price $538.86 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Flange Diameter (DF): 10.300    Flange Width (BF): 1.000    Precision Grade: P6   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684A-ZZ-MC3-JP6 (PK-100)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Jul 11, 2026
Regular price $538.86 AUD
Regular price $1,139.76 AUD Sale price $538.86 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Flange Diameter (DF)
10.300
Flange Width (BF)
1.000
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684A-ZZ-MC3 (PK-100)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Jul 11, 2026
Regular price $465.68 AUD
Regular price $1,046.52 AUD Sale price $465.68 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Flange Diameter (DF): 10.300    Flange Width (BF): 1.000    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684A-ZZ-MC3 (PK-100)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Jul 11, 2026
Regular price $465.68 AUD
Regular price $1,046.52 AUD Sale price $465.68 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Flanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Flange Diameter (DF)
10.300
Flange Width (BF)
1.000
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6   
Category: Bearings - Single Row Ball - Flanged
Part Number: F684A-ZZ-MC3-JP6 (PK-100)
Contact Us | Special Order Only - Please contact us if you need a large quantity
Single Row Ball Bearings - 4x9x4 mm Flanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Flange Diameter (DF): 10.300    Flange Width (BF): 1.000    Precision Grade: P6   
Category: Bearings - Single Row Ball - Flanged
Part Number: F684A-ZZ-MC3-JP6 (PK-100)
Contact Us | Special Order Only - Please contact us if you need a large quantity | Backorder now for delivery around Fri, Mar 02, 2029
Single Row Ball Bearings - 4x9x4 mm Flanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Flange Diameter (DF)
10.300
Flange Width (BF)
1.000
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: F684A-ZZ-MC3 (PK-100)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Jul 11, 2026
Regular price $582.95 AUD
Regular price $1,233.00 AUD Sale price $582.95 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Flanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Flange Diameter (DF): 10.300    Flange Width (BF): 1.000    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: F684A-ZZ-MC3 (PK-100)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Jul 11, 2026
Regular price $582.95 AUD
Regular price $1,233.00 AUD Sale price $582.95 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x10x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
10.000
mm
Width (B)
3.000
mm
Single Row Ball Bearings - 4x10x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Non ISO Width
Part Number: MR104-ZZS-ECO (Each)
576 Available Now | Further orders can be expected around Sun, Jul 05, 2026
Regular price $2.41 AUD
Regular price Sale price $2.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 576 available can be backordered.
Single Row Ball Bearings - 4x10x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
10.000
mm
Width (B)
3.000
mm
Single Row Ball Bearings - 4x10x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Non ISO Width
Part Number: MR104-ZZS-ECO (Each)
576 Available Now | Further orders can be expected around Sun, Jul 05, 2026
Regular price $2.41 AUD
Regular price Sale price $2.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

576 Available Now. Backorder if more than 576.
Single Row Ball Bearings - 4x10x3 mm Flanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.125
(Equiv. 0.118 in.)
Flange Diameter (DF)
11.200
Flange Width (BF)
0.600
Single Row Ball Bearings - 4x10x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: FMR104-MC3-AF12 (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Jul 16, 2026
Regular price $39.41 AUD
Regular price $81.22 AUD Sale price $39.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x10x3 mm Flanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.125
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x10x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Flange Diameter (DF): 11.200    Flange Width (BF): 0.600    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: FMR104-MC3-AF12 (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Jul 16, 2026
Regular price $39.41 AUD
Regular price $81.22 AUD Sale price $39.41 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x10x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
10.000
mm
Width (B)
3.000
mm
Single Row Ball Bearings - 4x10x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Deleted Item. Available while stocks last. Non ISO Width
Part Number: MR104-2RB-ECO (Each)
179 Available Now | Item Discontinued - Up to 179 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $4.00 AUD
Regular price $7.60 AUD Sale price $4.00 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

179 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x10x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
10.000
mm
Width (B)
3.000
mm
Single Row Ball Bearings - 4x10x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Deleted Item. Available while stocks last. Non ISO Width
Part Number: MR104-2RB-ECO (Each)
179 Available Now | Item Discontinued - Up to 179 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $4.00 AUD
Regular price $7.60 AUD Sale price $4.00 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

179 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
10.000
mm
Width (B)
4.000
mm
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Double black rubber sealed economy bearing
Part Number: MR104A-2RS-ECO (PK-2)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 05, 2026
Regular price $1.23 AUD
Regular price $1.47 AUD Sale price $1.23 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
10.000
mm
Width (B)
4.000
mm
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Double black rubber sealed economy bearing
Part Number: MR104A-2RS-ECO (PK-2)
Out of Stock | Backorder Now | Backorder now for delivery around Sun, Jul 05, 2026
Regular price $1.23 AUD
Regular price $1.47 AUD Sale price $1.23 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
10.000
mm
Width (B)
4.000
mm
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Double shielded economy bearing
Part Number: MR104A-ZZ-ECO (PK-5)
27 units (135 pcs) Available Now | Further orders can be expected around Sun, Jul 05, 2026
Regular price $5.32 AUD
Regular price Sale price $5.32 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 27 available can be backordered.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
10.000
mm
Width (B)
4.000
mm
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Double shielded economy bearing
Part Number: MR104A-ZZ-ECO (PK-5)
27 units (135 pcs) Available Now | Further orders can be expected around Sun, Jul 05, 2026
Regular price $5.32 AUD
Regular price Sale price $5.32 AUD
Priced, Stocked and Sold Per 5 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

27 units (135 pcs) Available Now. Backorder if more than 27.
Single Row Ball Bearings - 4x10x3 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.125
(Equiv. 0.118 in.)
Flange Diameter (DF)
11.200
Flange Width (BF)
0.600
Single Row Ball Bearings - 4x10x3 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: SFMR104-MC3-AF12 (PK-100)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Jul 11, 2026
Regular price $562.32 AUD
Regular price $1,189.44 AUD Sale price $562.32 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x10x3 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.125
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x10x3 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Flange Diameter (DF): 11.200    Flange Width (BF): 0.600    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: SFMR104-MC3-AF12 (PK-100)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Jul 11, 2026
Regular price $562.32 AUD
Regular price $1,189.44 AUD Sale price $562.32 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.007
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6   
Category: Bearings - Single Row Ball - Unflanged
Double shielded P6 precision stainless steel bearing
Part Number: SMR104A-ZZ-MC3-JP6 (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Jul 18, 2026
Regular price $11.59 AUD
Regular price $13.91 AUD Sale price $11.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.007
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6   
Category: Bearings - Single Row Ball - Unflanged
Double shielded P6 precision stainless steel bearing
Part Number: SMR104A-ZZ-MC3-JP6 (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Jul 18, 2026
Regular price $11.59 AUD
Regular price $13.91 AUD Sale price $11.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.007
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6   
Category: Bearings - Single Row Ball - Unflanged
Part Number: MR104A-ZZ-MC3-JP6 (PK-100)
Contact Us | Special Order Only - Please contact us if you need a large quantity
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.007
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6   
Category: Bearings - Single Row Ball - Unflanged
Part Number: MR104A-ZZ-MC3-JP6 (PK-100)
Contact Us | Special Order Only - Please contact us if you need a large quantity | Backorder now for delivery around Fri, Mar 02, 2029
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Double shielded standard bearing
Part Number: MR104A-ZZ-MC3 (Each)
72 Available Now | Further orders can be expected around Sat, Jul 11, 2026
Regular price $3.59 AUD
Regular price Sale price $3.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 72 available can be backordered.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Double shielded standard bearing
Part Number: MR104A-ZZ-MC3 (Each)
72 Available Now | Further orders can be expected around Sat, Jul 11, 2026
Regular price $3.59 AUD
Regular price Sale price $3.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

72 Available Now. Backorder if more than 72.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
10.000
mm
Width (B)
4.000
mm
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Deleted Item. Available while stocks last. Double blue rubber sealed economy bearing
Part Number: MR104A-2RB-ECO (PK-10)
18 units (180 pcs) Available Now | Item Discontinued - Up to 18 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $20.00 AUD
Regular price $38.00 AUD Sale price $20.00 AUD
Priced, Stocked and Sold Per 10 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

18 units (180 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
10.000
mm
Width (B)
4.000
mm
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Deleted Item. Available while stocks last. Double blue rubber sealed economy bearing
Part Number: MR104A-2RB-ECO (PK-10)
18 units (180 pcs) Available Now | Item Discontinued - Up to 18 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $20.00 AUD
Regular price $38.00 AUD Sale price $20.00 AUD
Priced, Stocked and Sold Per 10 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

18 units (180 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.004
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.005
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: Abec 7   
Category: Bearings - Single Row Ball - Unflanged
Part Number: SMR104A-ZZS-MC34-GR7-R-G48 (PK-52)
Out of Stock | Backorder Now | Backorder now for delivery around Mon, Aug 03, 2026
Regular price $2,551.68 AUD
Regular price $3,062.02 AUD Sale price $2,551.68 AUD
Priced, Stocked and Sold Per 52 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x10x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.004
(Equiv. 0.157 in.)
O.D. (D)
10.000
mm
+ 0.000 / - 0.005
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: Abec 7   
Category: Bearings - Single Row Ball - Unflanged
Part Number: SMR104A-ZZS-MC34-GR7-R-G48 (PK-52)
Out of Stock | Backorder Now | Backorder now for delivery around Mon, Aug 03, 2026
Regular price $2,551.68 AUD
Regular price $3,062.02 AUD Sale price $2,551.68 AUD
Priced, Stocked and Sold Per 52 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.