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ID ID |
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Thickness Thickness |
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Material Material |
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Finish Finish |
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Washer Type Washer Type |
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Curved | Split Lock |
Hardness Hardness |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Overall Height Overall Height |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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About Washers
More
Unthreaded Spacers for Tubes



Also known as saddle washers, the curved end of these spacers fits against round objects such as tube and pipe. Made of nylon, they have excellent wear and abrasion resistance and also offer resistance to chemicals and solvents (except mineral acids). Exposure to moisture may cause them to expand.
For technical drawings and 3-D models, click on a part number.
For Tube OD | OD | Lg. | For Screw Size | ID | Temperature Range, °F | Color | Specifications Met | Pkg. Qty. | Pkg. | |
Nylon 6/6 Plastic | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
3/4" | 3/4" | 1/8" | 1/4" | 0.260" | -20° to 155° | Off-White | UL 94 V-2 | 50 | 000000000 | 000000 |
7/8" | 27/32" | 5/32" | 1/4" | 0.257" | -20° to 155° | Off-White | UL 94 V-2 | 50 | 000000000 | 00000 |
1" | 53/64" | 1/2" | No. 12 | 0.218" | -20° to 155° | Off-White | UL 94 V-2 | 25 | 000000000 | 00000 |
1" | 1" | 1/4" | 1/4" | 0.260" | -20° to 155° | Off-White | UL 94 V-2 | 25 | 000000000 | 00000 |
1" | 1" | 1/4" | 5/16" | 0.325" | -20° to 155° | Off-White | UL 94 V-2 | 25 | 000000000 | 00000 |
1 7/64" | 1" | 1/8" | No. 12 | 0.250" | -20° to 155° | Off-White | UL 94 V-2 | 25 | 000000000 | 00000 |
1 1/8" | 7/8" | 1/4" | 5/16" | 0.375" | -20° to 155° | Off-White | UL 94 V-2 | 25 | 000000000 | 00000 |
Curved Washers

Also known as saddle washers, these curved washers fit round surfaces such as tubes and pipe. They 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 | |||||||
---|---|---|---|---|---|---|---|
For 3/4" Tube OD | |||||||
1/4" | 0.280" | 1.000" | 0.050"-0.070" | Rockwell B40 | 25 | 000000000 | 000000 |
5/16" | 0.330" | 1.000" | 0.050"-0.070" | Rockwell B40 | 25 | 000000000 | 00000 |
3/8" | 0.410" | 1.000" | 0.050"-0.070" | Rockwell B40 | 25 | 000000000 | 00000 |
For 7/8" Tube OD | |||||||
1/4" | 0.280" | 1.000" | 0.050"-0.070" | Rockwell B40 | 25 | 000000000 | 00000 |
5/16" | 0.330" | 1.000" | 0.050"-0.070" | Rockwell B40 | 25 | 000000000 | 00000 |
3/8" | 0.410" | 1.000" | 0.050"-0.070" | Rockwell B40 | 25 | 000000000 | 00000 |
For 1" Tube OD | |||||||
1/4" | 0.280" | 1.000" | 0.050"-0.070" | Rockwell B40 | 25 | 000000000 | 00000 |
5/16" | 0.330" | 1.000" | 0.050"-0.070" | Rockwell B40 | 25 | 000000000 | 00000 |
3/8" | 0.410" | 1.000" | 0.050"-0.070" | Rockwell B40 | 25 | 000000000 | 00000 |
Metric Split Lock Washers






As you tighten a bolt, these metric washers flatten to add tension to the threaded joint and prevent loosening from small amounts of vibration. They meet a DIN or ASME standard for split lock washer dimensions.
Curved and wave split lock washers can be used with fasteners that have right- or left-hand threads to prevent clockwise and counterclockwise rotation. These washers are reusable—they retain their shape when untightened and will not damage fasteners. Stainless steel washers resist corrosion better than steel and are nearly as strong. 18-8 stainless steel washers withstand humid, damp, and washdown environments but will corrode when exposed to salt water and other chlorine solutions. Stronger and more durable than stainless steel, zinc-plated and yellow zinc-plated steel washers withstand wet environments. However, they will corrode in salt water and chlorine solutions. The zinc plating temporarily protects against rust, but once it wears off, the steel will rust.
Steel washers are stronger and resist wear better than zinc-plated steel and stainless steel washers. Use them in dry environments. Black-oxide steel washers have a black residue that forms from being heat treated; the color will wear away over time.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID, mm | OD, mm | Thick., mm | Overall Ht., mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
---|---|---|---|---|---|---|---|---|---|
Curved | |||||||||
M2.5 | 2.6 | 5.1 | 0.5 | 0.9 | Not Rated | DIN 128A | 100 | 000000000 | 00000 |
M3 | 3.1 | 6.2 | 0.6 | 1.1 | Not Rated | DIN 128A | 100 | 000000000 | 0000 |
M4 | 4.1 | 7.6 | 0.7 | 1.2 | Not Rated | DIN 128A | 100 | 000000000 | 0000 |
M5 | 5.1 | 9.2 | 0.9 | 1.5 | Not Rated | DIN 128A | 100 | 000000000 | 0000 |
M6 | 6.1 | 11.8 | 1.2 | 2 | Not Rated | DIN 128A | 100 | 000000000 | 00000 |
M8 | 8.1 | 14.8 | 1.5 | 2.5 | Not Rated | DIN 128A | 50 | 000000000 | 0000 |
M10 | 10.2 | 18.1 | 1.7 | 2.9 | Not Rated | DIN 128A | 50 | 000000000 | 00000 |
M12 | 12.2 | 21.1 | 2.0 | 3.4 | Not Rated | DIN 128A | 50 | 000000000 | 00000 |
M14 | 14.2 | 24.1 | 2.3 | 3.9 | Not Rated | DIN 128A | 25 | 000000000 | 00000 |
M16 | 16.2 | 27.4 | 2.7 | 4.5 | Not Rated | DIN 128A | 20 | 000000000 | 00000 |
M18 | 18.2 | 29.4 | 2.7 | 4.5 | Not Rated | DIN 128A | 10 | 000000000 | 00000 |
M20 | 20.2 | 33.6 | 3.0 | 5.1 | Not Rated | DIN 128A | 10 | 000000000 | 00000 |
M22 | 22.5 | 35.9 | 3.0 | 5.1 | Not Rated | DIN 128A | 5 | 000000000 | 0000 |
M24 | 24.5 | 40.0 | 3.8 | 6.5 | Not Rated | DIN 128A | 5 | 000000000 | 00000 |
Zinc-Plated Steel | |||||||||
Curved | |||||||||
M2.5 | 2.6 | 5.1 | 0.5 | 0.9 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
M3 | 3.1 | 6.2 | 0.6 | 1.1 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
M4 | 4.1 | 7.6 | 0.7 | 1.2 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
M5 | 5.1 | 9.2 | 0.9 | 1.5 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
M6 | 6.1 | 11.8 | 1.2 | 2 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
M8 | 8.1 | 14.8 | 1.5 | 2.5 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
M10 | 10.2 | 18.1 | 1.7 | 2.9 | Rockwell C44 | DIN 128A | 100 | 000000000 | 00000 |
M12 | 12.2 | 21.1 | 2.0 | 3.4 | Rockwell C44 | DIN 128A | 50 | 000000000 | 0000 |
M14 | 14.2 | 24.1 | 2.3 | 3.9 | Rockwell C44 | DIN 128A | 25 | 000000000 | 0000 |
M16 | 16.2 | 27.4 | 2.7 | 4.5 | Rockwell C44 | DIN 128A | 25 | 000000000 | 0000 |
M18 | 18.2 | 29.4 | 2.7 | 4.5 | Rockwell C44 | DIN 128A | 10 | 000000000 | 0000 |
M20 | 20.2 | 33.6 | 3.0 | 5.1 | Rockwell C44 | DIN 128A | 10 | 000000000 | 0000 |
M22 | 22.5 | 35.9 | 3.0 | 5.1 | Rockwell C44 | DIN 128A | 10 | 000000000 | 00000 |
M24 | 24.5 | 40.0 | 3.8 | 6.5 | Rockwell C44 | DIN 128A | 10 | 000000000 | 00000 |
M30 | 30.5 | 48.2 | 5.8 | 9.5 | Rockwell C44 | DIN 128A | 1 | 000000000 | 0000 |
Yellow Zinc-Plated Steel | |||||||||
Curved | |||||||||
M3 | 3.1 | 6.2 | 0.6 | 1.1 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
M3.5 | 3.6 | 6.7 | 0.6 | 1.1 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
M4 | 4.1 | 7.6 | 0.7 | 1.2 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
M5 | 5.1 | 9.2 | 0.9 | 1.5 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
M6 | 6.1 | 11.8 | 1.2 | 2 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
M8 | 8.1 | 14.8 | 1.5 | 2.5 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
M10 | 10.2 | 18.1 | 1.7 | 2.9 | Rockwell C44 | DIN 128A | 100 | 000000000 | 00000 |
M12 | 12.2 | 21.1 | 2.0 | 3.4 | Rockwell C44 | DIN 128A | 50 | 000000000 | 0000 |
M14 | 14.2 | 24.1 | 2.3 | 3.9 | Rockwell C44 | DIN 128A | 25 | 000000000 | 00000 |
M16 | 16.2 | 27.4 | 2.7 | 4.5 | Rockwell C44 | DIN 128A | 10 | 000000000 | 00000 |
M20 | 20.2 | 33.6 | 3.0 | 5.1 | Rockwell C44 | DIN 128A | 10 | 000000000 | 00000 |
Steel | |||||||||
Curved | |||||||||
M2.5 | 2.3 | 4.6 | 0.6 | 1.1 | Rockwell C44 | DIN 6905 | 200 | 000000000 | 0000 |
M3 | 2.7 | 5.6 | 0.7 | 1.3 | Rockwell C44 | DIN 6905 | 200 | 000000000 | 0000 |
M4 | 3.6 | 7.0 | 0.8 | 1.4 | Rockwell C44 | DIN 6905 | 200 | 000000000 | 00000 |
M5 | 4.6 | 8.6 | 1.0 | 1.7 | Rockwell C44 | DIN 6905 | 100 | 000000000 | 00000 |
M6 | 5.5 | 11.0 | 1.3 | 2.2 | Rockwell C44 | DIN 6905 | 50 | 000000000 | 00000 |
M8 | 7.4 | 14.0 | 1.6 | 2.8 | Rockwell C44 | DIN 6905 | 50 | 000000000 | 00000 |
M10 | 9.3 | 17.0 | 1.8 | 3.2 | Rockwell C44 | DIN 6905 | 10 | 000000000 | 00000 |
M12 | 11.0 | 19.7 | 2.1 | 3.7 | Rockwell C44 | DIN 6905 | 10 | 000000000 | 00000 |
Black-Oxide Steel | |||||||||
Curved | |||||||||
M3 | 3.1 | 6.2 | 0.6 | 1.1 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
M4 | 4.1 | 7.6 | 0.7 | 1.2 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
M5 | 5.1 | 9.2 | 0.9 | 1.5 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
M6 | 6.1 | 11.8 | 1.2 | 2 | Rockwell C44 | DIN 128A | 50 | 000000000 | 0000 |
M8 | 8.1 | 14.8 | 1.5 | 2.5 | Rockwell C44 | DIN 128A | 50 | 000000000 | 0000 |
M10 | 10.2 | 18.1 | 1.7 | 2.9 | Rockwell C44 | DIN 128A | 25 | 000000000 | 00000 |
M12 | 12.2 | 21.1 | 2.0 | 3.4 | Rockwell C44 | DIN 128A | 10 | 000000000 | 0000 |
M16 | 16.2 | 27.4 | 2.7 | 4.5 | Rockwell C44 | DIN 128A | 10 | 000000000 | 0000 |
M20 | 20.2 | 33.6 | 3.0 | 5.1 | Rockwell C44 | DIN 128A | 5 | 000000000 | 0000 |
M24 | 24.5 | 40.0 | 3.8 | 6.5 | Rockwell C44 | DIN 128A | 5 | 000000000 | 00000 |