Tooth Location Tooth Location |
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 | External |
 | Internal |
 | Internal/External |
Washer Type Washer Type |
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| Countersunk | Tooth Lock |
System of Measurement System of Measurement |
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For Screw Size For Screw Size | Show |
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For Screw Size For Screw Size | Hide |
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Material Material |
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Finish Finish |
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Specifications Met Specifications Met |
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Thickness Thickness |
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Hardness Hardness |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Countersink Angle Countersink Angle |
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About Washers
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External-Tooth Lock Washers
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.
316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.
400 series stainless steel washers have excellent wear resistance, but aren’t as corrosion resistant as other stainless steel washers. They may be mildly magnetic.
Black-oxide steel washers are mildly corrosion resistant in dry environments.
Zinc-plated steel washers are corrosion resistant in wet environments.
Bronze washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.
Washers that meet ASME B18.21.1 adhere to strict dimensional standards. The zinc-plated steel washers also meet standards for material properties.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| No. 10 | 0.195" | 0.410" | 0.018"-0.024" | Not Rated | ASME B18.21.1 | 10 | 000000000 | 00000 |
18-8 Stainless Steel | ||||||||
| No. 10 | 0.195" | 0.410" | 0.018"-0.024" | Not Rated | ASME B18.21.1 | 100 | 000000000 | 0000 |
Black-Oxide 18-8 Stainless Steel | ||||||||
| No. 10 | 0.195" | 0.410" | 0.018"-0.024" | Rockwell B88 | ASME B18.21.1 | 100 | 000000000 | 0000 |
400 Series Stainless Steel | ||||||||
| No. 10 | 0.195" | 0.410" | 0.018"-0.024" | Rockwell C34 | ASME B18.21.1 | 100 | 000000000 | 0000 |
Black-Oxide Steel | ||||||||
| No. 10 | 0.195" | 0.410" | 0.018"-0.024" | Rockwell C40 | ASME B18.21.1 | 100 | 000000000 | 0000 |
Zinc-Plated Steel | ||||||||
| No. 10 | 0.195" | 0.410" | 0.018"-0.024" | Rockwell C40 | ASME B18.21.1 | 100 | 000000000 | 00000 |
Bronze | ||||||||
| No. 10 | 0.195" | 0.410" | 0.018"-0.024" | Rockwell B60 | ASME B18.21.1 | 100 | 000000000 | 0000 |
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. 10 | 0.195" | 0.410" | 0.020"-0.025" | Rockwell C40 | ASME B18.21.1; MS35335-60 | MS35335 | 25 | 000000000 | 000000 |
Zinc-Plated Steel | |||||||||
MS-35335/NASM 35335 | |||||||||
| No. 10 | 0.195" | 0.410" | 0.020"-0.025" | Rockwell C40 | ASME B18.21.1; MS35335-32 | MS35335 | 100 | 000000000 | 00000 |
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 |
Countersunk External-Tooth Lock Washers
The teeth on these washers firmly grip heads of 82° flat head countersunk screws to prevent joints from loosening under vibration.
Black-oxide steel washers are mildly corrosion resistant in dry environments.
Zinc-plated steel washers are corrosion resistant in wet environments.
400-series stainless steel washers have excellent wear resistance and may be mildly magnetic.
All washers meet ASME B18.21.1 dimensional standards. The zinc-plated steel washers also meet standards for material properties.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Countersink Angle | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Oxide Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| No. 10 | 0.195" | 0.354" | 0.020"-0.025" | 82° | Rockwell C40 | ASME B18.21.1 | 25 | 000000000 | 00000 |
Zinc-Plated Steel | |||||||||
| No. 10 | 0.195" | 0.354" | 0.020"-0.025" | 82° | Rockwell C44 | ASME B18.21.1 | 50 | 000000000 | 00000 |
400 Series Stainless Steel | |||||||||
| No. 10 | 0.195" | 0.354" | 0.020"-0.025" | 82° | Rockwell C34 | ASME B18.21.1 | 25 | 000000000 | 0000 |
Internal-Tooth Lock Washers
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.
316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.
400 series stainless steel washers have excellent wear resistance, but aren’t as corrosion resistant as other stainless steel washers. They may be mildly magnetic.
Zinc-plated steel washers are corrosion resistant in wet environments.
Bronze washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.
Washers that meet ASME B18.21.1 adhere to strict dimensional standards. The zinc-plated steel washers also meet standards for material properties.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thickness | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| No. 10 | 0.195" | 0.381" | 0.018"-0.024" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 00000 |
18-8 Stainless Steel | ||||||||
| No. 10 | 0.195" | 0.381" | 0.018"-0.024" | Not Rated | ASME B18.21.1 | 100 | 000000000 | 0000 |
400 Series Stainless Steel | ||||||||
| No. 10 | 0.195" | 0.381" | 0.018"-0.024" | Rockwell C34 | ASME B18.21.1 | 100 | 000000000 | 0000 |
| No. 10 | 0.204" | 0.381" | 0.018"-0.024" | Rockwell C34 | ASME B18.21.1 | 1,000 | 000000000 | 00000 |
Zinc-Plated Steel | ||||||||
| No. 10 | 0.195" | 0.381" | 0.018"-0.024" | Rockwell C44 | ASME B18.21.1 | 100 | 000000000 | 0000 |
Bronze | ||||||||
| No. 10 | 0.195" | 0.381" | 0.018"-0.024" | Rockwell B60 | ASME B18.21.1 | 100 | 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. 10 | 0.195" | 0.381" | 0.020"-0.025" | Rockwell C40-50 | ASME B18.21.1; MS35333-39; NASM35333 | 25 | 000000000 | 00000 |
Bronze | ||||||||
MS-35333/NASM 35333 | ||||||||
| No. 10 | 0.195" | 0.381" | 0.020"-0.025" | Rockwell B90 | ASME B18.21.1; MS35333-107; NASM35333 | 25 | 000000000 | 00000 |
410 Stainless Steel | ||||||||
MS-35333/NASM 35333 | ||||||||
| No. 10 | 0.195" | 0.381" | 0.020"-0.025" | Rockwell C40-50 | ASME B18.21.1; MS35333-73; NASM35333 | 25 | 000000000 | 00000 |
Internal-Tooth Lock Washers for Soft Material
Slightly domed with an oversized outside diameter, these washers distribute your fastener's load over a larger surface area than other internal-tooth lock washers to limit damage to soft material. Internal teeth dig into the screw head to prevent joints from loosening under vibration. Washers are zinc-plated steel for corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Hardness | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||
|---|---|---|---|---|---|---|---|
| No. 10 | 0.195" | 0.569" | 0.027"-0.031" | Rockwell C44 | 10 | 000000000 | 000000 |
Internal-/External-Tooth Lock Washers
The combination of internal and external teeth boosts gripping power to maintain a tight hold and provide more vibration resistance than other tooth lock washers. Use with fasteners that have heads large enough to make contact with the external teeth, such as pan, button, and binding head screws.
Black-oxide steel washers are mildly corrosion resistant in dry environments. Zinc-plated steel washers are corrosion resistant in wet environments.
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. | |
Black-Oxide Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| No. 10 | 0.195" | 0.601" | 0.027"-0.031" | Rockwell C40 | ASME B18.21.1 | 100 | 000000000 | 000000 |
Zinc-Plated Steel | ||||||||
| No. 10 | 0.195" | 0.601" | 0.027"-0.031" | Rockwell C40 | ASME B18.21.1 | 100 | 000000000 | 00000 |
410 Stainless Steel | ||||||||
| No. 10 | 0.195" | 0.610" | 0.028"-0.034" | Not Rated | ASME B18.21.1 | 100 | 000000000 | 0000 |