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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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About Nuts, Materials, and Finishes
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Steel Locknuts with External-Tooth Lock Washer
Also known as Keps and K-Lock nuts, these locknuts have a free-spinning tooth lock washer that grips the material surface instead of threads for easy installation and mild vibration resistance. Height includes the thickness of the washer. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Washer | |||||||
|---|---|---|---|---|---|---|---|
| Thread Size | Wd. | Ht. | Material | OD | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||
| 4-40 | 1/4" | 7/64" | Steel | 0.281" | 100 | 000000000 | 00000 |
| 5-40 | 5/16" | 9/64" | Steel | 0.344" | 100 | 000000000 | 00000 |
| 6-32 | 1/4" | 1/8" | Steel | 0.281" | 100 | 000000000 | 00000 |
| 6-32 | 5/16" | 9/64" | Steel | 0.344" | 100 | 000000000 | 0000 |
| 8-32 | 5/16" | 9/64" | Steel | 0.344" | 100 | 000000000 | 00000 |
| 8-32 | 11/32" | 5/32" | Steel | 0.375" | 100 | 000000000 | 0000 |
| 10-24 | 3/8" | 5/32" | Steel | 0.406" | 100 | 000000000 | 0000 |
| 10-32 | 3/8" | 5/32" | Steel | 0.406" | 100 | 000000000 | 0000 |
| 12-24 | 7/16" | 3/16" | Steel | 0.5" | 50 | 000000000 | 0000 |
| 1/4"-20 | 7/16" | 15/64" | Steel | 0.5" | 100 | 000000000 | 0000 |
| 1/4"-28 | 7/16" | 15/64" | Steel | 0.5" | 100 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 21/64" | Steel | 0.578" | 100 | 000000000 | 0000 |
| 5/16"-24 | 1/2" | 5/16" | Steel | 0.592" | 50 | 000000000 | 00000 |
| 3/8"-16 | 9/16" | 25/64" | Steel | 0.656" | 100 | 000000000 | 00000 |
| 3/8"-24 | 9/16" | 25/64" | Steel | 0.656" | 100 | 000000000 | 00000 |
| 1/2"-13 | 3/4" | 31/64" | Steel | 0.891" | 10 | 000000000 | 0000 |
Black Zinc-Plated Steel | |||||||
| 4-40 | 1/4" | 1/8" | Steel | 0.281" | 100 | 000000000 | 0000 |
| 6-32 | 5/16" | 9/64" | Steel | 0.344" | 100 | 000000000 | 0000 |
| 8-32 | 11/32" | 5/32" | Steel | 0.375" | 100 | 000000000 | 0000 |
| 10-24 | 3/8" | 5/32" | Steel | 0.406" | 100 | 000000000 | 0000 |
| 10-32 | 3/8" | 5/32" | Steel | 0.406" | 100 | 000000000 | 0000 |
| 1/4"-20 | 7/16" | 7/32" | Steel | 0.5" | 100 | 000000000 | 00000 |
Metric Steel Locknuts with External-Tooth Lock Washer
Also known as Keps and K-lock nuts, these locknuts have a free-spinning tooth lock washer that grips the material surface instead of threads for easy installation and mild vibration resistance. Height includes the thickness of the washer. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread | Washer | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Material | OD, mm | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 8 | ||||||||
| M3 | 0.5 | 5.5 | 3.3 | Steel | 7.1 | 100 | 000000000 | 000000 |
| M4 | 0.7 | 7 | 4.1 | Steel | 8.5 | 100 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.2 | Steel | 9.5 | 100 | 000000000 | 00000 |
| M6 | 1 | 10 | 6.2 | Steel | 12 | 100 | 000000000 | 00000 |
| M8 | 1.25 | 13 | 8.5 | Steel | 15.5 | 25 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 9.7 | Steel | 20.1 | 10 | 000000000 | 00000 |
Black Zinc-Plated Steel—Class 8 | ||||||||
| M3 | 0.5 | 5.5 | 3 | Steel | 7.1 | 100 | 000000000 | 00000 |
| M4 | 0.7 | 7 | 4.1 | Steel | 8.5 | 100 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.2 | Steel | 9.5 | 100 | 000000000 | 00000 |
| M6 | 1 | 10 | 6.2 | Steel | 12 | 50 | 000000000 | 00000 |
| M8 | 1.25 | 13 | 8.5 | Steel | 15.5 | 25 | 000000000 | 00000 |
| M10 | 1.5 | 17 | 9.7 | Steel | 20.1 | 10 | 000000000 | 00000 |
Stainless Steel Locknuts with External-Tooth Lock Washer
These stainless steel locknuts have good chemical resistance and may be mildly magnetic. Also known as Keps and K-Lock nuts, they have a free-spinning tooth lock washer that grips the material surface instead of threads for easy installation and mild vibration resistance. Height includes the thickness of the washer.
For technical drawings and 3-D models, click on a part number.
Washer | |||||||
|---|---|---|---|---|---|---|---|
| Thread Size | Wd. | Ht. | Material | OD | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||
Standard Hex Nut Profile | |||||||
| 4-40 | 1/4" | 1/8" | 400 Stainless Steel | 0.281" | 100 | 000000000 | 00000 |
| 6-32 | 5/16" | 9/64" | 400 Stainless Steel | 0.344" | 100 | 000000000 | 0000 |
| 8-32 | 11/32" | 11/64" | 400 Stainless Steel | 0.375" | 100 | 000000000 | 0000 |
| 10-24 | 3/8" | 11/64" | 400 Stainless Steel | 0.406" | 100 | 000000000 | 0000 |
| 10-32 | 3/8" | 11/64" | 400 Stainless Steel | 0.406" | 100 | 000000000 | 0000 |
| 12-24 | 7/16" | 11/64" | 400 Stainless Steel | 0.5" | 50 | 000000000 | 0000 |
| 1/4"-20 | 7/16" | 15/64" | 400 Stainless Steel | 0.5" | 50 | 000000000 | 0000 |
| 1/4"-28 | 7/16" | 15/64" | 400 Stainless Steel | 0.5" | 50 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 21/64" | 400 Stainless Steel | 0.578" | 25 | 000000000 | 0000 |
| 5/16"-24 | 1/2" | 21/64" | 400 Stainless Steel | 0.578" | 25 | 000000000 | 0000 |
| 3/8"-16 | 9/16" | 25/64" | 400 Stainless Steel | 0.656" | 25 | 000000000 | 0000 |
| 3/8"-24 | 9/16" | 25/64" | 400 Stainless Steel | 0.656" | 10 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 7/16" | 400 Stainless Steel | 0.871" | 10 | 000000000 | 0000 |
Narrow Hex Nut Profile | |||||||
| 6-32 | 1/4" | 3/32" | 400 Stainless Steel | 0.344" | 100 | 000000000 | 00000 |
Metric Stainless Steel Locknuts with External-Tooth Lock Washer
These locknuts have good chemical resistance and may be mildly magnetic. Also known as Keps and K-Lock nuts, they have a free-spinning tooth lock washer that grips the material surface instead of threads for easy installation and mild vibration resistance. Height includes the thickness of the washer.
Black-oxide stainless steel nuts have a dark surface color.
For technical drawings and 3-D models, click on a part number.
Thread | Washer | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Material | OD, mm | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
| M3 | 0.5 | 5.5 | 3.3 | 400 Stainless Steel | 6.5 | 50 | 000000000 | 000000 |
| M4 | 0.7 | 7 | 4.1 | 400 Stainless Steel | 8.2 | 50 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.2 | 400 Stainless Steel | 9.5 | 25 | 000000000 | 0000 |
| M6 | 1 | 10 | 6.2 | 400 Stainless Steel | 11.5 | 25 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 8.5 | 18-8 Stainless Steel | 15.1 | 5 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 9.7 | 18-8 Stainless Steel | 19.2 | 5 | 000000000 | 00000 |
Black-Oxide 18-8 Stainless Steel | ||||||||
| M3 | 0.5 | 5.5 | 3.3 | Black-Oxide 400 Stainless Steel | 6.5 | 25 | 000000000 | 0000 |
| M4 | 0.7 | 7 | 4.1 | Black-Oxide 400 Stainless Steel | 8.2 | 25 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.2 | Black-Oxide 400 Stainless Steel | 9.5 | 25 | 000000000 | 00000 |
| M6 | 1 | 10 | 6.2 | Black-Oxide 400 Stainless Steel | 11.5 | 25 | 000000000 | 00000 |
Metric Steel Nonmarring Locknuts with Spring-Lock Washer
A conical washer acts as a spring to add tension between the nut and the material surface for easy installation and mild vibration resistance. They have a smooth rim to resist scratching materials when tightened. Also known as Keps and K-lock nuts. Height includes the thickness of the washer.
Zinc-plated locknuts have an outer layer of zinc that provides corrosion resistance in wet environments.
Black oxide locknuts are mildly corrosion resistant and have a dark surface color.
For technical drawings and 3-D models, click on a part number.
Thread | Washer | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Material | OD, mm | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 8 | ||||||||
| M3 | 0.5 | 5.5 | 3.8 | Steel | 8 | 50 | 000000000 | 000000 |
| M4 | 0.7 | 7 | 4.2 | Steel | 10 | 100 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.3 | Steel | 12 | 100 | 000000000 | 00000 |
| M6 | 1 | 10 | 6.6 | Steel | 14 | 50 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 8.8 | Steel | 18 | 50 | 000000000 | 00000 |
| M10 | 1.5 | 17 | 10.7 | Steel | 22 | 10 | 000000000 | 00000 |
| M12 | 1.75 | 19 | 13.8 | Steel | 25.5 | 25 | 000000000 | 00000 |
Black-Oxide Steel—Class 8 | ||||||||
| M3 | 0.5 | 6 | 3.5 | Steel | 10 | 50 | 000000000 | 00000 |
| M4 | 0.7 | 7 | 4.2 | Steel | 10 | 50 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.3 | Steel | 12 | 50 | 000000000 | 00000 |
| M6 | 1 | 10 | 6.6 | Steel | 14 | 25 | 000000000 | 0000 |
Steel Nonmarring Locknuts with Spring-Lock Washer
These locknuts have a curved washer that acts as a spring to add tension between the nut and the material surface for easy installation and mild vibration resistance. The smooth rim makes them less likely to scratch materials when tightened than locknuts with a tooth lock washer. Also known as Keps and K-lock nuts.
Black-oxide locknuts are mildly corrosion resistant and have a dark surface color.
Zinc-plated locknuts have an outer layer of zinc that provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Washer | |||||||
|---|---|---|---|---|---|---|---|
| Thread Size | Wd. | Ht. | Material | OD | Pkg. Qty. | Pkg. | |
Black-Oxide Steel | |||||||
| 4-40 | 1/4" | 9/64" | Steel | 0.328" | 50 | 000000000 | 000000 |
| 6-32 | 5/16" | 9/64" | Steel | 0.328" | 25 | 000000000 | 00000 |
| 8-32 | 11/32" | 3/16" | Steel | 0.375" | 10 | 000000000 | 0000 |
| 10-32 | 3/8" | 3/16" | Steel | 0.406" | 10 | 000000000 | 0000 |
| 1/4"-20 | 7/16" | 3/16" | Steel | 0.5" | 10 | 000000000 | 0000 |
Zinc-Plated Steel | |||||||
| 4-40 | 1/4" | 9/64" | Steel | 0.328" | 25 | 000000000 | 00000 |
| 6-32 | 5/16" | 9/64" | Steel | 0.328" | 25 | 000000000 | 00000 |
| 8-32 | 11/32" | 3/16" | Steel | 0.375" | 50 | 000000000 | 00000 |
| 10-32 | 3/8" | 3/16" | Steel | 0.406" | 25 | 000000000 | 00000 |
| 1/4"-20 | 7/16" | 3/16" | Steel | 0.5" | 10 | 000000000 | 00000 |
Flanged Push Nuts
A flange distributes the load over a large area and reduces stress where the nut meets the material surface. Push them over threads to hold fasteners in light-duty holding applications. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
| For Thread Size | Wd. | Ht. | Flange Dia. | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||
|---|---|---|---|---|---|---|
| 6-32 | 5/16" | 13/64" | 7/16" | 100 | 000000000 | 00000 |
| 8-32 | 11/32" | 7/32" | 15/32" | 100 | 000000000 | 0000 |
| 10-24 | 3/8" | 15/64" | 1/2" | 100 | 000000000 | 0000 |
| 10-24 | 3/8" | 17/64" | 3/4" | 100 | 000000000 | 00000 |
| 10-32 | 3/8" | 13/64" | 1/2" | 100 | 000000000 | 0000 |
| 1/4"-20 | 7/16" | 1/4" | 19/32" | 100 | 000000000 | 00000 |
| 1/4"-20 | 7/16" | 19/64" | 13/16" | 50 | 000000000 | 0000 |
Flanged Push-On External Retaining Rings
The wide flange provides better load distribution than standard external push rings and can be used to cover oversized holes. Also known as thread cutting nuts. Use them on unhardened shafts that are softer than the push ring. The ring bites into the metal to form an interference grip.
For technical drawings and 3-D models, click on a part number.
| For OD | Flange Dia. | Hex Wd. | Ht. | Min. Hardness | Magnetic Properties | Pkg. Qty. | Pkg. | |
Zinc-Plated 1050 Spring Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/8" | 7/16" | 5/16" | 3/16" | Rockwell C41 | Magnetic | 100 | 000000000 | 00000 |
| 1/8" | 17/32" | 5/16" | 13/64" | Rockwell C41 | Magnetic | 100 | 000000000 | 00000 |
| 5/32" | 9/16" | 3/8" | 13/64" | Rockwell C41 | Magnetic | 100 | 000000000 | 0000 |
| 3/16" | 1/2" | 3/8" | 7/32" | Rockwell C41 | Magnetic | 100 | 000000000 | 0000 |
| 3/16" | 5/8" | 3/8" | 15/64" | Rockwell C41 | Magnetic | 100 | 000000000 | 00000 |
| 1/4" | 19/32" | 7/16" | 15/64" | Rockwell C41 | Magnetic | 100 | 000000000 | 00000 |
| 1/4" | 11/16" | 7/16" | 15/64" | Rockwell C41 | Magnetic | 100 | 000000000 | 00000 |
| 5/16" | 7/8" | 1/2" | 5/16" | Rockwell C41 | Magnetic | 50 | 000000000 | 00000 |