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About Washers
More
Mil. Spec. External-Tooth Lock Washers

Choose these washers for their adherence to strict military standards for material and construction. Teeth on the outside edge of the washer bite into the screw head and joint for a tight grip. Use with fasteners that have heads large enough to make contact with the teeth, such as pan, button, and binding head screws.
410 stainless steel washers have excellent wear resistance.
Zinc-plated steel washers have an outer layer of zinc that protects the inner steel from rust and extends the life of the washer.
Bronze washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Military Specifications Met | Pkg. Qty. | Pkg. | |
410 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
MS-35335/NASM 35335 | |||||||||
| No. 4 | 0.115" | 0.260" | 0.015"-0.019" | Rockwell C40 | ASME B18.21.1; MS35335-57 | MS35335 | 25 | 000000000 | 000000 |
| No. 6 | 0.141" | 0.320" | 0.016"-0.022" | Rockwell C40 | ASME B18.21.1; MS35335-58 | MS35335 | 25 | 000000000 | 00000 |
| No. 8 | 0.168" | 0.381" | 0.018"-0.023" | Rockwell C40 | ASME B18.21.1; MS35335-59 | MS35335 | 25 | 000000000 | 00000 |
| No. 10 | 0.195" | 0.410" | 0.020"-0.025" | Rockwell C40 | ASME B18.21.1; MS35335-60 | MS35335 | 25 | 000000000 | 00000 |
| 1/4" | 0.256" | 0.510" | 0.023"-0.028" | Rockwell C40 | ASME B18.21.1; MS35335-61 | MS35335 | 25 | 000000000 | 00000 |
| 5/16" | 0.320" | 0.610" | 0.028"-0.034" | Rockwell C40 | ASME B18.21.1; MS35335-62 | MS35335 | 25 | 000000000 | 00000 |
| 3/8" | 0.384" | 0.694" | 0.032"-0.040" | Rockwell C40 | ASME B18.21.1; MS35335-63 | MS35335 | 25 | 000000000 | 00000 |
| 7/16" | 0.448" | 0.760" | 0.032"-0.040" | Rockwell C40 | ASME B18.21.1; MS35335-64 | MS35335 | 25 | 000000000 | 00000 |
| 1/2" | 0.513" | 0.900" | 0.037"-0.045" | Rockwell C40 | ASME B18.21.1; MS35335-65 | MS35335 | 10 | 000000000 | 0000 |
| 9/16" | 0.576" | 0.985" | 0.037"-0.045" | Rockwell C40 | ASME B18.21.1; MS35335-66 | MS35335 | 10 | 000000000 | 0000 |
| 5/8" | 0.641" | 1.070" | 0.042"-0.050" | Rockwell C40 | ASME B18.21.1; MS35335-67 | MS35335 | 5 | 000000000 | 0000 |
| 3/4" | 0.768" | 1.260" | 0.047"-0.055" | Rockwell C40 | ASME B18.21.1; MS35335-68 | MS35335 | 5 | 000000000 | 0000 |
| 7/8" | 0.897" | 1.410" | 0.052"-0.060" | Rockwell C40 | ASME B18.21.1; MS35335-69 | MS35335 | 1 | 000000000 | 0000 |
| 1" | 1.025" | 1.620" | 0.059"-0.067" | Rockwell C40 | ASME B18.21.1; MS35335-70 | MS35335 | 1 | 000000000 | 0000 |
Zinc-Plated Steel | |||||||||
MS-35335/NASM 35335 | |||||||||
| No. 4 | 0.115" | 0.260" | 0.015"-0.019" | Rockwell C40 | ASME B18.21.1; MS35335-29 | MS35335 | 100 | 000000000 | 0000 |
| No. 6 | 0.141" | 0.320" | 0.016"-0.022" | Rockwell C40 | ASME B18.21.1; MS35335-30 | MS35335 | 100 | 000000000 | 00000 |
| No. 8 | 0.168" | 0.381" | 0.018"-0.023" | Rockwell C40 | ASME B18.21.1; MS35335-31 | MS35335 | 100 | 000000000 | 00000 |
| No. 10 | 0.195" | 0.410" | 0.020"-0.025" | Rockwell C40 | ASME B18.21.1; MS35335-32 | MS35335 | 100 | 000000000 | 00000 |
| 1/4" | 0.256" | 0.510" | 0.023"-0.028" | Rockwell C40 | ASME B18.21.1; MS35335-33 | MS35335 | 100 | 000000000 | 00000 |
| 5/16" | 0.320" | 0.610" | 0.028"-0.034" | Rockwell C40 | ASME B18.21.1; MS35335-34 | MS35335 | 50 | 000000000 | 00000 |
| 3/8" | 0.384" | 0.694" | 0.032"-0.040" | Rockwell C40 | ASME B18.21.1; MS35335-35 | MS35335 | 50 | 000000000 | 00000 |
| 7/16" | 0.448" | 0.760" | 0.032"-0.040" | Rockwell C40 | ASME B18.21.1; MS35335-36 | MS35335 | 25 | 000000000 | 00000 |
| 1/2" | 0.513" | 0.900" | 0.037"-0.045" | Rockwell C40 | ASME B18.21.1; MS35335-37 | MS35335 | 25 | 000000000 | 00000 |
| 9/16" | 0.576" | 0.985" | 0.037"-0.045" | Rockwell C40 | ASME B18.21.1; MS35335-38 | MS35335 | 25 | 000000000 | 00000 |
| 5/8" | 0.641" | 1.070" | 0.042"-0.050" | Rockwell C40 | ASME B18.21.1; MS35335-39 | MS35335 | 10 | 000000000 | 0000 |
| 3/4" | 0.768" | 1.260" | 0.047"-0.055" | Rockwell C40 | ASME B18.21.1; MS35335-40 | MS35335 | 10 | 000000000 | 0000 |
| 7/8" | 0.897" | 1.410" | 0.052"-0.060" | Rockwell C40 | ASME B18.21.1; MS35335-41 | MS35335 | 10 | 000000000 | 0000 |
| 1" | 1.025" | 1.620" | 0.059"-0.067" | Rockwell C40 | ASME B18.21.1; MS35335-42 | MS35335 | 5 | 000000000 | 0000 |
Bronze | |||||||||
MS-35335/NASM 35335 | |||||||||
| No. 10 | 0.195" | 0.410" | 0.020"-0.025" | Not Rated | ASME B18.21.1; MS35335-88 | MS35335 | 25 | 000000000 | 0000 |
| 1/4" | 0.256" | 0.510" | 0.023"-0.028" | Not Rated | ASME B18.21.1; MS35335-89 | MS35335 | 10 | 000000000 | 0000 |
| 5/16" | 0.320" | 0.610" | 0.028"-0.034" | Not Rated | ASME B18.21.1; MS35335-90 | MS35335 | 10 | 000000000 | 0000 |
| 3/8" | 0.384" | 0.694" | 0.032"-0.040" | Not Rated | ASME B18.21.1; MS35335-91 | MS35335 | 10 | 000000000 | 0000 |
| 1/2" | 0.513" | 0.900" | 0.037"-0.045" | Not Rated | ASME B18.21.1; MS35335-93 | MS35335 | 10 | 000000000 | 0000 |
Mil. Spec. Internal-Tooth Lock Washers

Choose these washers for their adherence to strict military standards for material and construction. Internal teeth dig into the screw head while the smooth outside edge won't snag objects. These washers provide greater vibration resistance than split lock washers. Use with fasteners that have small heads, such as fillister and cheese head screws.
Cadmium-plated steel washers are corrosion resistant in wet environments.
Bronze washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.
410 stainless steel washers have excellent wear resistance.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Cadmium-Plated Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
MS-35333/NASM 35333 | ||||||||
| No. 2 | 0.089" | 0.200" | 0.010"-0.015" | Rockwell C40-50 | ASME B18.21.1; MS35333-35; NASM35333 | 25 | 000000000 | 00000 |
| No. 4 | 0.115" | 0.270" | 0.015"-0.019" | Rockwell C40-50 | ASME B18.21.1; MS35333-36; NASM35333 | 25 | 000000000 | 0000 |
| No. 6 | 0.141" | 0.295" | 0.017"-0.021" | Rockwell C40-50 | ASME B18.21.1; MS35333-37; NASM35333 | 25 | 000000000 | 0000 |
| No. 8 | 0.168" | 0.340" | 0.018"-0.023" | Rockwell C40-50 | ASME B18.21.1; MS35333-38; NASM35333 | 25 | 000000000 | 0000 |
| No. 10 | 0.195" | 0.381" | 0.020"-0.025" | Rockwell C40-50 | ASME B18.21.1; MS35333-39; NASM35333 | 25 | 000000000 | 0000 |
| 1/4" | 0.256" | 0.478" | 0.023"-0.028" | Rockwell C40-50 | ASME B18.21.1; MS35333-40; NASM35333 | 25 | 000000000 | 0000 |
| 5/16" | 0.332" | 0.610" | 0.028"-0.034" | Rockwell C40-50 | ASME B18.21.1; MS35333-41; NASM35333 | 25 | 000000000 | 0000 |
| 3/8" | 0.384" | 0.692" | 0.032"-0.040" | Rockwell C40-50 | ASME B18.21.1; MS35333-42; NASM35333 | 25 | 000000000 | 00000 |
| 7/16" | 0.448" | 0.789" | 0.032"-0.040" | Rockwell C40-50 | ASME B18.21.1; MS35333-43; NASM35333 | 25 | 000000000 | 00000 |
| 1/2" | 0.512" | 0.900" | 0.037"-0.045" | Rockwell C40-50 | ASME B18.21.1; MS35333-44; NASM35333 | 25 | 000000000 | 00000 |
| 5/8" | 0.640" | 1.071" | 0.042"-0.050" | Rockwell C40-50 | ASME B18.21.1; MS35333-46; NASM35333 | 10 | 000000000 | 0000 |
| 3/4" | 0.769" | 1.245" | 0.047"-0.055" | Rockwell C40-50 | ASME B18.21.1; MS35333-47; NASM35333 | 10 | 000000000 | 0000 |
| 7/8" | 0.894" | 1.410" | 0.052"-0.060" | Rockwell C40-50 | ASME B18.21.1; MS35333-48; NASM35333 | 10 | 000000000 | 00000 |
| 1" | 1.019" | 1.637" | 0.059"-0.067" | Rockwell C40-50 | ASME B18.21.1; MS35333-49; NASM35333 | 5 | 000000000 | 0000 |
| 1 1/4" | 1.260" | 1.950" | 0.059"-0.067" | Rockwell C40-50 | ASME B18.21.1; MS35333-51; NASM35333 | 5 | 000000000 | 0000 |
Bronze | ||||||||
MS-35333/NASM 35333 | ||||||||
| No. 2 | 0.089" | 0.200" | 0.010"-0.015" | Rockwell B90 | ASME B18.21.1; MS35333-103; NASM35333 | 25 | 000000000 | 0000 |
| No. 4 | 0.115" | 0.270" | 0.015"-0.019" | Rockwell B90 | ASME B18.21.1; MS35333-104; NASM35333 | 25 | 000000000 | 0000 |
| No. 6 | 0.141" | 0.295" | 0.017"-0.021" | Rockwell B90 | ASME B18.21.1; MS35333-105; NASM35333 | 25 | 000000000 | 00000 |
| No. 8 | 0.168" | 0.340" | 0.018"-0.023" | Rockwell B90 | ASME B18.21.1; MS35333-106; NASM35333 | 25 | 000000000 | 00000 |
| No. 10 | 0.195" | 0.381" | 0.020"-0.025" | Rockwell B90 | ASME B18.21.1; MS35333-107; NASM35333 | 25 | 000000000 | 00000 |
| 1/4" | 0.256" | 0.478" | 0.023"-0.028" | Rockwell B90 | ASME B18.21.1; MS35333-108; NASM35333 | 25 | 000000000 | 00000 |
| 5/16" | 0.332" | 0.610" | 0.028"-0.034" | Rockwell B90 | ASME B18.21.1; MS35333-109; NASM35333 | 10 | 000000000 | 0000 |
| 3/8" | 0.384" | 0.692" | 0.032"-0.040" | Rockwell B90 | ASME B18.21.1; MS35333-110; NASM35333 | 10 | 000000000 | 0000 |
| 1/2" | 0.512" | 0.900" | 0.037"-0.045" | Rockwell B90 | ASME B18.21.1; MS35333-113; NASM35333 | 5 | 000000000 | 0000 |
410 Stainless Steel | ||||||||
MS-35333/NASM 35333 | ||||||||
| No. 2 | 0.089" | 0.200" | 0.010"-0.015" | Rockwell C40-50 | ASME B18.21.1; MS35333-69; NASM35333 | 25 | 000000000 | 0000 |
| No. 4 | 0.115" | 0.270" | 0.015"-0.019" | Rockwell C40-50 | ASME B18.21.1; MS35333-70; NASM35333 | 25 | 000000000 | 00000 |
| No. 6 | 0.141" | 0.295" | 0.017"-0.021" | Rockwell C40-50 | ASME B18.21.1; MS35333-71; NASM35333 | 25 | 000000000 | 00000 |
| No. 8 | 0.168" | 0.340" | 0.018"-0.023" | Rockwell C40-50 | ASME B18.21.1; MS35333-72; NASM35333 | 25 | 000000000 | 00000 |
| No. 10 | 0.195" | 0.381" | 0.020"-0.025" | Rockwell C40-50 | ASME B18.21.1; MS35333-73; NASM35333 | 25 | 000000000 | 00000 |
| 1/4" | 0.256" | 0.478" | 0.023"-0.028" | Rockwell C40-50 | ASME B18.21.1; MS35333-74; NASM35333 | 25 | 000000000 | 00000 |
| 5/16" | 0.332" | 0.610" | 0.028"-0.034" | Rockwell C40-50 | ASME B18.21.1; MS35333-75; NASM35333 | 25 | 000000000 | 0000 |
| 3/8" | 0.384" | 0.692" | 0.032"-0.040" | Rockwell C40-50 | ASME B18.21.1; MS35333-76; NASM35333 | 25 | 000000000 | 00000 |
| 7/16" | 0.448" | 0.789" | 0.032"-0.040" | Rockwell C40-50 | ASME B18.21.1; MS35333-77; NASM35333 | 25 | 000000000 | 00000 |
| 1/2" | 0.512" | 0.900" | 0.037"-0.045" | Rockwell C40-50 | ASME B18.21.1; MS35333-78; NASM35333 | 10 | 000000000 | 00000 |
| 5/8" | 0.640" | 1.071" | 0.042"-0.050" | Rockwell C40-50 | ASME B18.21.1; MS35333-80; NASM35333 | 10 | 000000000 | 00000 |
| 3/4" | 0.769" | 1.245" | 0.047"-0.055" | Rockwell C40-50 | ASME B18.21.1; MS35333-81; NASM35333 | 5 | 000000000 | 00000 |
| 7/8" | 0.894" | 1.410" | 0.052"-0.060" | Rockwell C40-50 | ASME B18.21.1; MS35333-82; NASM35333 | 5 | 000000000 | 00000 |
Rolled-Rim Reinforcing Fabric Grommets
A rolled rim provides added grip while the elongated neck and teeth on the washer, also known as a spur washer, add reinforcement and reduce rotation so you can use these grommets in thick materials such as canvas. Press the grommets into a hole you've already cut. They strengthen and prevent holes from fraying in tarps, covers, and curtains. They also provide a way to run rope and cable through your material. Use a cutting punch (sold separately) to create the hole, then set the grommet using either an installation punch or a press (both sold separately). Grommet trade size refers to the hole size and the size of the installation tool needed. All of these grommets can be used outdoors.
Grommets with a tooth lock washer keep material from loosening and rotating better than those with a standard washer.
Grommets that meet MIL-G-16491, NASM20230, and AN230 adhere to military dimensional standards.
Brass grommets are strong and have good corrosion resistance. Nickel-plated brass grommets have more corrosion resistance than brass grommets.
Hammer-driven cutting punches create holes for installing grommets when you strike them with a wooden or rawhide mallet. Hammer-driven installation punches set grommets in a hole when you strike them with a wooden or rawhide mallet. Manual presses set grommets in a hole when you squeeze the adjustable pliers-grip handle. Requires a die set (sold separately).
For technical drawings and 3-D models, click on a part number.

| Grommet Trade Size | For Max. Material Thick. | ID (C) | Flange Dia. (D) | Dp. Under Flange (F) | For Use Outdoors | Specifications Met | Pkg. Qty. | Pkg. | |
Brass | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 0 | 0.096" | 9/32" | 0.67" | 0.175" | Yes | MIL-G-16491, NASM20230, AN230 | 50 | 0000000 | 000000 |
| 1 | 0.126" | 13/32" | 0.79" | 0.205" | Yes | MIL-G-16491, NASM20230, AN230 | 50 | 0000000 | 00000 |
| 2 | 0.174" | 7/16" | 0.89" | 0.255" | Yes | MIL-G-16491, NASM20230, AN230 | 25 | 0000000 | 00000 |
| 3 | 0.172" | 15/32" | 0.97" | 0.255" | Yes | MIL-G-16491, NASM20230, AN230 | 25 | 0000000 | 00000 |
| 4 | 0.237" | 9/16" | 1.12" | 0.32" | Yes | MIL-G-16491, NASM20230, AN230 | 25 | 0000000 | 00000 |
| 5 | 0.296" | 5/8" | 1.285" | 0.38" | Yes | MIL-G-16491, NASM20230, AN230 | 10 | 0000000 | 00000 |
| 6 | 0.332" | 3/4" | 1.535" | 0.42" | Yes | MIL-G-16491, NASM20230, AN230 | 5 | 0000000 | 0000 |
| 7 | 0.363" | 29/32" | 1.725" | 0.446" | Yes | MIL-G-16491, NASM20230, AN230 | 5 | 0000000 | 00000 |
| 8 | 0.382" | 1 3/32" | 1.865" | 0.465" | Yes | MIL-G-16491, NASM20230, AN230 | 5 | 0000000 | 00000 |
Nickel-Plated Brass | |||||||||
| 0 | 0.096" | 9/32" | 0.67" | 0.175" | Yes | MIL-G-16491, NASM16491, NASM20230, AN230 | 50 | 00000000 | 00000 |
| 1 | 0.126" | 13/32" | 0.79" | 0.205" | Yes | MIL-G-16491, NASM16491, NASM20230, AN230 | 25 | 00000000 | 0000 |
| 2 | 0.174" | 7/16" | 0.89" | 0.255" | Yes | MIL-G-16491, NASM16491, NASM20230, AN230 | 25 | 00000000 | 00000 |
| 3 | 0.172" | 15/32" | 0.97" | 0.255" | Yes | MIL-G-16491, NASM16491, NASM20230, AN230 | 25 | 00000000 | 00000 |
| 4 | 0.237" | 9/16" | 1.12" | 0.32" | Yes | MIL-G-16491, NASM16491, NASM20230, AN230 | 10 | 00000000 | 0000 |
| 5 | 0.296" | 5/8" | 1.285" | 0.38" | Yes | MIL-G-16491, NASM16491, NASM20230, AN230 | 10 | 00000000 | 0000 |
| 6 | 0.332" | 3/4" | 1.535" | 0.42" | Yes | MIL-G-16491, NASM16491, NASM20230, AN230 | 5 | 00000000 | 0000 |
| 7 | 0.363" | 29/32" | 1.725" | 0.446" | Yes | MIL-G-16491, NASM16491, NASM20230, AN230 | 5 | 00000000 | 00000 |
| 8 | 0.382" | 1 3/32" | 1.865" | 0.465" | Yes | MIL-G-16491, NASM16491, NASM20230, AN230 | 5 | 00000000 | 00000 |

Throat | |||||
|---|---|---|---|---|---|
| Max. Opening | Dp. | Wd. | Material | Each | |
| 7/8" | 3 1/4" | 1 3/4" | Aluminum | 000000000 | 0000000 |
Fabric Grommet Kits

Kits include grommets, a cutting punch, a cutting block, an installation punch, and a die set. Use them to create a way to run rope and cable through tarps, covers, and curtains. Press the grommets into a hole you've already cut. They can also be used to strengthen and prevent existing holes from fraying in material. Use the cutting punch to create the hole, then set the grommet using the installation punch and die set. Made of brass, all of these grommets are strong and have good corrosion resistance. They adhere to military dimensional standard MIL-G-16491. They can also be used outdoors.
Grommets with a tooth lock washer keep material from loosening and rotating better than those with a standard washer.
For technical drawings and 3-D models, click on a part number.
| Grommet Trade Size | For Max. Material Thick. | ID (C) | Flange Dia. (D) | Dp. Under Flange (F) | For Use Outdoors | Specifications Met | Includes | No. of Grommets | Each | |
Grommets with Tooth Lock Washer | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Brass | ||||||||||
| 0 | 0.11" | 1/4" | 0.545" | 0.175" | Yes | MIL-G-16491 | Cutting Punch, Cutting Block, Installation Punch, Die Set | 48 | 0000000 | 000000 |
| 1 | 0.12" | 9/32" | 0.687" | 0.185" | Yes | MIL-G-16491 | Cutting Punch, Cutting Block, Installation Punch, Die Set | 48 | 0000000 | 00000 |
| 2 | 0.15" | 3/8" | 0.815" | 0.215" | Yes | MIL-G-16491 | Cutting Punch, Cutting Block, Installation Punch, Die Set | 24 | 0000000 | 00000 |
| 3 | 0.23" | 7/16" | 0.97" | 0.295" | Yes | MIL-G-16491 | Cutting Punch, Cutting Block, Installation Punch, Die Set | 24 | 0000000 | 00000 |
| 4 | 0.3" | 1/2" | 1.05" | 0.374" | Yes | MIL-G-16491 | Cutting Punch, Cutting Block, Installation Punch, Die Set | 24 | 0000000 | 00000 |


























