About Washers
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Metric Electrical-Insulating Plastic Washers
These washers are excellent electrical insulators.
Glass-filled nylon washers are reinforced with glass for increased strength. Exposure to moisture may cause them to expand.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID, mm | OD, mm | Thick., mm | Max. Temperature, °F | Hardness | Specifications Met | Pkg. Qty. | (Print) _temp | Pkg. | |
Glass-Filled Nylon Plastic | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Black | ||||||||||
M6 | 6.4 | 12.5 | 1.6 | 220° | Rockwell M111 | UL 94 HB | 10 | x | 000000000 | 000000 |
M8 | 8.4 | 17.0 | 1.6 | 220° | Rockwell M111 | UL 94 HB | 5 | x | 000000000 | 0000 |
White | ||||||||||
M6 | 6.4 | 12.5 | 1.6 | 220° | Rockwell M111 | UL 94 HB | 10 | x | 000000000 | 0000 |
M8 | 8.4 | 17.0 | 1.6 | 220° | Rockwell M111 | UL 94 HB | 5 | x | 000000000 | 0000 |
Metric Split Lock Washers
As a screw is tightened, these metric washers flatten to add tension to the joint, counteracting fatigue around the joint from small amounts of vibration. This makes them a common choice to prevent fasteners from loosening. However, they resist the least amount of vibration compared to other locking washers. 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.
Steel washers are stronger and resist wear better than zinc-plated steel and stainless steel washers. Use them in dry environments.
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. | |
Steel | |||||||||
---|---|---|---|---|---|---|---|---|---|
Curved | |||||||||
M8 | 7.4 | 14.0 | 1.6 | 2.8 | Rockwell C44 | DIN 6905 | 50 | 000000000 | 000000 |
Metric Tab Lock Washers
Bend the tab on these metric lock washers to prevent the fastener and washer from turning and loosening due to vibration. All meet DIN dimensional standards.
DIN 432 washers have a partial cone shape that gives them spring-like flexibility, so they distribute force and grip tighter than split and tooth lock washers. However, they do not resist vibration as well as DIN 93 washers. These washers prevent loosening from wear or changes in temperature when you bend the tab against the flats of a hex nut or bolt head. They do not need to be used near the edge of the mounting surface.
Steel washers resist wear better than 316 stainless steel but aren’t as corrosion resistant.
316 stainless steel washers are more corrosion resistant than steel, and nearly as strong. You can expose them to salt water, chlorine solutions, and chemicals without any rusting.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID, mm | OD, mm | Overall Ht., mm | Thick., mm | Tab Wd., mm | Hardness | Pkg. Qty. | Pkg. | |
DIN 432—Steel | |||||||||
---|---|---|---|---|---|---|---|---|---|
M20 | 21 | 42 | 4.5 | 1.6 | 6.5 | Rockwell B50 | 1 | 000000000 | 00000 |
M24 | 25 | 50 | 6.5 | 1.6 | 7.5 | Rockwell B50 | 1 | 000000000 | 0000 |
M30 | 31 | 63 | 9.5 | 1.6 | 8.5 | Rockwell B50 | 1 | 000000000 | 0000 |
DIN 432—316 Stainless Steel | |||||||||
M20 | 21 | 42 | 4.5 | 1.6 | 6.5 | Not Rated | 1 | 000000000 | 0000 |
M22 | 23 | 50 | 6.5 | 1.6 | 7.5 | Not Rated | 1 | 000000000 | 0000 |
M24 | 25 | 50 | 6.5 | 1.6 | 7.5 | Not Rated | 1 | 000000000 | 0000 |
M27 | 28 | 58 | 9.5 | 1.6 | 8.5 | Not Rated | 1 | 000000000 | 00000 |
M30 | 31 | 63 | 9.5 | 1.6 | 8.5 | Not Rated | 1 | 000000000 | 0000 |
Metric Single-Wave Washers
These curved, flexible washers act like springs to compensate for tolerance variations and uneven surfaces. You can also use them to damp vibration.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.
Steel washers are harder and hold their shape better than stainless steel washers, but aren’t as corrosion resistant. They have a black finish from heat treatment.
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 | |||||||||
---|---|---|---|---|---|---|---|---|---|
M14 | 15.0 | 28.0 | 1.6 | 6.0 | Not Rated | DIN 137B | 10 | 000000000 | 000000 |
M16 | 17.0 | 30.0 | 1.6 | 6.4 | Not Rated | DIN 137B | 10 | 000000000 | 0000 |
M18 | 19.0 | 34.0 | 1.6 | 6.6 | Not Rated | DIN 137B | 10 | 000000000 | 00000 |
M20 | 21.0 | 36.0 | 1.6 | 7.4 | Not Rated | DIN 137B | 5 | 000000000 | 0000 |
Black-Oxide Steel | |||||||||
M14 | 15.0 | 28.0 | 1.6 | 6.0 | Rockwell C42 | DIN 137B | 25 | 000000000 | 00000 |
M16 | 17.0 | 30.0 | 1.6 | 6.4 | Rockwell C42 | DIN 137B | 25 | 000000000 | 00000 |
M20 | 21.0 | 36.0 | 1.6 | 7.4 | Rockwell C42 | DIN 137B | 10 | 000000000 | 0000 |