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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. Wave washers touch fasteners at more points, so they grip tighter than curved washers. Their shape also compensates for uneven surfaces and tolerance variations.
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. Zinc-plated steel and zinc yellow-chromate 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.
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 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Wave | |||||||||
| M4 | 4.4 | 7.6 | 0.7 | 1.4 | Not Rated | DIN 128B | 50 | 000000000 | 000000 |
| M5 | 5.4 | 9.2 | 0.9 | 1.7 | Not Rated | DIN 128B | 25 | 000000000 | 0000 |
| M6 | 6.5 | 11.8 | 1.2 | 2.2 | Not Rated | DIN 128B | 25 | 000000000 | 0000 |
| M8 | 8.5 | 14.8 | 1.5 | 2.7 | Not Rated | DIN 128B | 25 | 000000000 | 0000 |
| M10 | 10.7 | 18.1 | 1.7 | 3.1 | Not Rated | DIN 128B | 25 | 000000000 | 00000 |
| M12 | 12.7 | 21.1 | 1.9 | 3.6 | Not Rated | DIN 128B | 10 | 000000000 | 0000 |
| M16 | 17.0 | 27.4 | 2.6 | 5.1 | Not Rated | DIN 128B | 1 | 000000000 | 0000 |
Zinc-Plated Steel | |||||||||
Wave | |||||||||
| M3 | 3.1 | 6.2 | 0.6 | 1.1 | Rockwell C44 | DIN 128B | 100 | 000000000 | 0000 |
| M4 | 4.1 | 7.6 | 0.7 | 1.2 | Rockwell C44 | DIN 128B | 100 | 000000000 | 0000 |
| M5 | 5.1 | 9.2 | 0.9 | 1.5 | Rockwell C44 | DIN 128B | 100 | 000000000 | 0000 |
| M6 | 6.1 | 11.8 | 1.2 | 2 | Rockwell C44 | DIN 128B | 100 | 000000000 | 00000 |
| M8 | 8.1 | 14.8 | 1.5 | 2.5 | Rockwell C44 | DIN 128B | 100 | 000000000 | 00000 |
| M10 | 10.2 | 18.1 | 1.7 | 2.9 | Rockwell C44 | DIN 128B | 50 | 000000000 | 00000 |
| M12 | 12.2 | 21.1 | 2.0 | 3.4 | Rockwell C44 | DIN 128B | 25 | 000000000 | 0000 |
| M14 | 14.2 | 24.1 | 2.4 | 3.9 | Rockwell C44 | DIN 128B | 25 | 000000000 | 00000 |
| M16 | 16.2 | 27.4 | 2.7 | 4.5 | Rockwell C44 | DIN 128B | 25 | 000000000 | 00000 |
| M18 | 18.2 | 29.4 | 2.7 | 4.5 | Rockwell C44 | DIN 128B | 10 | 000000000 | 0000 |
| M22 | 22.5 | 35.9 | 3.0 | 5.1 | Rockwell C44 | DIN 128B | 5 | 000000000 | 0000 |
| M24 | 24.5 | 40.0 | 3.8 | 6.5 | Rockwell C44 | DIN 128B | 5 | 000000000 | 00000 |
Triple-Wave Washers
With three points of surface contact, these washers provide more stability than single-wave washers. They are curved and flexible to act like springs, compensating 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.
316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Overall Ht. | Hardness | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| No. 2 | 0.097" | 0.168" | 0.010" | 0.040" | Not Rated | 10 | 000000000 | 00000 |
| No. 3 | 0.102" | 0.195" | 0.005" | 0.017" | Rockwell C45 | 10 | 000000000 | 0000 |
| No. 4 | 0.127" | 0.250" | 0.005" | 0.025" | Not Rated | 10 | 000000000 | 0000 |
| No. 5 | 0.130" | 0.190" | 0.005" | 0.035" | Not Rated | 10 | 000000000 | 0000 |
| No. 6 | 0.147" | 0.243" | 0.006" | 0.050" | Not Rated | 10 | 000000000 | 0000 |
| No. 8 | 0.195" | 0.245" | 0.006" | 0.055" | Not Rated | 10 | 000000000 | 0000 |
| No. 10 | 0.205" | 0.375" | 0.005" | 0.041" | Not Rated | 10 | 000000000 | 0000 |
| No. 12 | 0.245" | 0.377" | 0.006" | 0.030" | Rockwell C45 | 10 | 000000000 | 0000 |
| 1/4", No. 15, No. 16, No. 18, 5/16" | 0.328" | 0.682" | 0.010" | 0.073" | Not Rated | 10 | 000000000 | 0000 |
| 5/16", No. 20, No. 24, 3/8" | 0.391" | 0.682" | 0.010" | 0.080" | Not Rated | 10 | 000000000 | 0000 |
| 3/8", 7/16" | 0.453" | 0.850" | 0.010" | 0.100" | Not Rated | 10 | 000000000 | 0000 |
| 7/16", 1/2" | 0.516" | 0.860" | 0.010" | 0.101" | Not Rated | 10 | 000000000 | 00000 |
| 1/2", 9/16" | 0.578" | 0.995" | 0.015" | 0.104" | Not Rated | 10 | 000000000 | 00000 |
| 5/8", 11/16" | 0.703" | 1.120" | 0.015" | 0.135" | Not Rated | 10 | 000000000 | 00000 |
| 3/4", 13/16" | 0.828" | 1.432" | 0.020" | 0.135" | Not Rated | 5 | 000000000 | 0000 |
| 7/8", 15/16" | 0.953" | 1.557" | 0.020" | 0.135" | Not Rated | 5 | 000000000 | 0000 |
| 1" | 1.000" | 1.682" | 0.020" | 0.135" | Not Rated | 5 | 000000000 | 00000 |
| 1 1/16" | 1.073" | 1.425" | 0.015" | 0.090" | Rockwell C45 | 5 | 000000000 | 00000 |
| 1 1/8" | 1.155" | 1.375" | 0.015" | 0.105" | Rockwell C45 | 5 | 000000000 | 00000 |
| 1 1/4" | 1.265" | 1.625" | 0.020" | 0.125" | Rockwell C45 | 1 | 000000000 | 0000 |
| 1 1/2" | 1.560" | 2.380" | 0.016" | 0.100" | Rockwell C45 | 1 | 000000000 | 0000 |
| M2 | 2.410mm | 4.220mm | 0.254mm | 0.889mm | Rockwell C40 | 10 | 000000000 | 00000 |
| M2.5 | 3.175mm | 6.350mm | 0.127mm | 0.508mm | Rockwell C40 | 10 | 000000000 | 00000 |
| M3 | 3.251mm | 4.749mm | 0.127mm | 0.762mm | Rockwell C40 | 10 | 000000000 | 00000 |
| M4 | 4.343mm | 7.137mm | 0.508mm | 1.520mm | Rockwell C40 | 10 | 000000000 | 00000 |
| M5 | 5.160mm | 9.525mm | 0.127mm | 0.787mm | Rockwell C40 | 10 | 000000000 | 00000 |
| M6 | 6.350mm | 11.099mm | 0.076mm | 0.889mm | Rockwell C40 | 5 | 000000000 | 0000 |
| M8 | 8.255mm | 12.573mm | 0.203mm | 1.220mm | Rockwell C40 | 5 | 000000000 | 0000 |
| M10 | 10.287mm | 13.970mm | 0.152mm | 1.524mm | Rockwell C40 | 5 | 000000000 | 0000 |
Black-Oxide 18-8 Stainless Steel | ||||||||
| No. 2 | 0.100" | 0.171" | 0.010" | 0.040" | Rockwell C40 | 10 | 000000000 | 00000 |
| No. 4 | 0.130" | 0.255" | 0.005" | 0.025" | Rockwell C40 | 10 | 000000000 | 00000 |
| No. 6 | 0.150" | 0.245" | 0.006" | 0.050" | Rockwell C40 | 10 | 000000000 | 00000 |
| No. 8 | 0.200" | 0.250" | 0.006" | 0.055" | Rockwell C40 | 10 | 000000000 | 00000 |
| No. 10 | 0.208" | 0.385" | 0.005" | 0.041" | Rockwell C40 | 10 | 000000000 | 00000 |
316 Stainless Steel | ||||||||
| No. 2 | 0.100" | 0.171" | 0.010" | 0.040" | Rockwell C46 | 10 | 000000000 | 00000 |
| No. 4 | 0.130" | 0.255" | 0.005" | 0.025" | Rockwell C46 | 10 | 000000000 | 00000 |
| No. 5 | 0.133" | 0.192" | 0.005" | 0.035" | Rockwell C46 | 10 | 000000000 | 00000 |
| No. 6 | 0.150" | 0.245" | 0.006" | 0.050" | Rockwell C46 | 10 | 000000000 | 00000 |
| No. 8 | 0.200" | 0.250" | 0.006" | 0.055" | Rockwell C46 | 10 | 000000000 | 00000 |
| No. 10 | 0.208" | 0.385" | 0.005" | 0.041" | Rockwell C46 | 10 | 000000000 | 00000 |
Steel | ||||||||
| No. 2 | 0.095" | 0.181" | 0.010" | 0.035" | Rockwell C52 | 10 | 000000000 | 00000 |
| No. 4 | 0.125" | 0.250" | 0.005" | 0.020" | Rockwell C52 | 25 | 000000000 | 00000 |
| No. 5 | 0.145" | 0.240" | 0.005" | 0.040" | Rockwell C52 | 25 | 000000000 | 00000 |
| No. 6, No. 7, No. 8 | 0.159" | 0.375" | 0.012" | 0.055" | Rockwell C44 | 50 | 000000000 | 00000 |
| No. 10 | 0.214" | 0.250" | 0.008" | 0.050" | Rockwell C44 | 100 | 000000000 | 00000 |
| No. 12 | 0.227" | 0.500" | 0.010" | 0.060" | Rockwell C52 | 25 | 000000000 | 00000 |
| 1/4" | 0.252" | 0.375" | 0.010" | 0.060" | Rockwell C44 | 50 | 000000000 | 00000 |
| 5/16" | 0.320" | 0.437" | 0.006" | 0.040" | Rockwell C44 | 50 | 000000000 | 00000 |
| 3/8" | 0.393" | 0.500" | 0.007" | 0.070" | Rockwell C44 | 50 | 000000000 | 00000 |
| 7/16" | 0.450" | 0.750" | 0.015" | 0.090" | Rockwell C44 | 50 | 000000000 | 00000 |
| 1/2" | 0.520" | 0.750" | 0.015" | 0.090" | Rockwell C44 | 25 | 000000000 | 00000 |
| 9/16" | 0.625" | 0.870" | 0.010" | 0.060" | Rockwell C52 | 25 | 000000000 | 00000 |
| 5/8" | 0.655" | 0.855" | 0.010" | 0.070" | Rockwell C44 | 50 | 000000000 | 00000 |
| 3/4" | 0.752" | 1.062" | 0.015" | 0.115" | Rockwell C44 | 25 | 000000000 | 00000 |
| 7/8" | 0.961" | 1.230" | 0.020" | 0.100" | Rockwell C52 | 10 | 000000000 | 00000 |
| 1" | 1.055" | 1.351" | 0.015" | 0.115" | Rockwell C47 | 25 | 000000000 | 00000 |
| 1 1/16" | 1.068" | 1.500" | 0.018" | 0.094" | Rockwell C52 | 10 | 000000000 | 00000 |
| 1 1/8" | 1.155" | 1.375" | 0.015" | 0.105" | Rockwell C52 | 10 | 000000000 | 00000 |
| 1 1/4" | 1.360" | 1.675" | 0.020" | 0.145" | Rockwell C52 | 5 | 000000000 | 00000 |
| 1 3/8" | 1.406" | 1.812" | 0.020" | 0.130" | Rockwell C52 | 5 | 000000000 | 00000 |
| 1 1/2" | 1.550" | 2.000" | 0.022" | 0.140" | Rockwell C52 | 5 | 000000000 | 00000 |
| 1 3/4" | 1.840" | 2.375" | 0.025" | 0.168" | Rockwell C52 | 5 | 000000000 | 00000 |
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.
Bronze washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.
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 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| M2.5 | 2.7 | 5.0 | 0.3 | 1.4 | Not Rated | DIN 137B | 50 | 000000000 | 000000 |
| M3 | 3.2 | 8.0 | 0.5 | 1.6 | Not Rated | DIN 137B | 100 | 000000000 | 0000 |
| M3.5 | 3.7 | 8.0 | 0.5 | 1.8 | Not Rated | DIN 137B | 100 | 000000000 | 00000 |
| M4 | 4.3 | 9.0 | 0.5 | 2.0 | Not Rated | DIN 137B | 100 | 000000000 | 0000 |
| M5 | 5.3 | 11.0 | 0.5 | 2.2 | Not Rated | DIN 137B | 100 | 000000000 | 0000 |
| M6 | 6.4 | 12.0 | 0.5 | 2.6 | Not Rated | DIN 137B | 100 | 000000000 | 0000 |
| M8 | 8.4 | 15.0 | 0.8 | 3.0 | Not Rated | DIN 137B | 50 | 000000000 | 0000 |
| M10 | 10.5 | 21.0 | 1.0 | 4.2 | Not Rated | DIN 137B | 25 | 000000000 | 0000 |
| M12 | 13.0 | 24.0 | 1.2 | 5.0 | Not Rated | DIN 137B | 10 | 000000000 | 0000 |
| M14 | 15.0 | 28.0 | 1.6 | 6.0 | Not Rated | DIN 137B | 10 | 000000000 | 00000 |
| 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 |
| M24 | 25.0 | 44.0 | 1.8 | 8.2 | Not Rated | DIN 137B | 5 | 000000000 | 00000 |
Bronze | |||||||||
| M3 | 3.2 | 8.0 | 0.5 | 1.6 | Not Rated | DIN 137B | 25 | 000000000 | 00000 |
| M4 | 4.3 | 9.0 | 0.5 | 2.0 | Not Rated | DIN 137B | 25 | 000000000 | 00000 |
| M5 | 5.3 | 11.0 | 0.5 | 2.2 | Not Rated | DIN 137B | 10 | 000000000 | 0000 |
| M6 | 6.4 | 12.0 | 0.5 | 2.6 | Not Rated | DIN 137B | 10 | 000000000 | 0000 |
| M8 | 8.4 | 15.0 | 0.8 | 3.0 | Not Rated | DIN 137B | 5 | 000000000 | 0000 |
| M10 | 10.5 | 21.0 | 1.0 | 4.2 | Not Rated | DIN 137B | 1 | 000000000 | 0000 |
| M12 | 13.0 | 24.0 | 1.2 | 5.0 | Not Rated | DIN 137B | 1 | 000000000 | 0000 |
Black-Oxide Steel | |||||||||
| M3 | 3.2 | 8.0 | 0.5 | 1.6 | Rockwell C42 | DIN 137B | 100 | 000000000 | 0000 |
| M4 | 4.3 | 9.0 | 0.5 | 2.0 | Rockwell C42 | DIN 137B | 100 | 000000000 | 0000 |
| M5 | 5.3 | 11.0 | 0.5 | 2.2 | Rockwell C42 | DIN 137B | 100 | 000000000 | 0000 |
| M6 | 6.4 | 12.0 | 0.5 | 2.6 | Rockwell C42 | DIN 137B | 100 | 000000000 | 0000 |
| M7 | 7.4 | 14.0 | 0.8 | 3.0 | Rockwell C42 | DIN 137B | 100 | 000000000 | 00000 |
| M8 | 8.4 | 15.0 | 0.8 | 3.0 | Rockwell C42 | DIN 137B | 100 | 000000000 | 00000 |
| M10 | 10.5 | 21.0 | 1.0 | 4.2 | Rockwell C42 | DIN 137B | 100 | 000000000 | 00000 |
| M12 | 13.0 | 24.0 | 1.2 | 5.0 | Rockwell C42 | DIN 137B | 25 | 000000000 | 0000 |
| 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 |
| M24 | 25.0 | 44.0 | 1.8 | 8.2 | Rockwell C42 | DIN 137B | 5 | 000000000 | 00000 |
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.
316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Overall Ht. | Hardness | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| No. 0 | 0.072" | 0.170" | 0.010" | 0.050" | Rockwell C40 | 10 | 000000000 | 00000 |
| No. 2 | 0.095" | 0.130" | 0.004" | 0.040" | Rockwell C40 | 10 | 000000000 | 0000 |
| No. 4 | 0.121" | 0.240" | 0.008" | 0.056" | Rockwell C40 | 10 | 000000000 | 0000 |
| No. 5 | 0.135" | 0.245" | 0.004" | 0.055" | Rockwell C40 | 10 | 000000000 | 0000 |
| No. 6 | 0.148" | 0.270" | 0.005" | 0.062" | Rockwell C40 | 10 | 000000000 | 0000 |
| No. 8 | 0.165" | 0.285" | 0.006" | 0.053" | Rockwell C40 | 10 | 000000000 | 0000 |
| No. 10 | 0.200" | 0.300" | 0.010" | 0.061" | Rockwell C40 | 10 | 000000000 | 0000 |
| 1/4" | 0.260" | 0.485" | 0.010" | 0.070" | Rockwell C40 | 10 | 000000000 | 00000 |
Black-Oxide 18-8 Stainless Steel | ||||||||
| No. 0 | 0.072" | 0.170" | 0.010" | 0.050" | Rockwell C40 | 10 | 000000000 | 00000 |
| No. 4 | 0.121" | 0.240" | 0.008" | 0.056" | Rockwell C40 | 10 | 000000000 | 00000 |
| No. 5 | 0.135" | 0.245" | 0.004" | 0.055" | Rockwell C40 | 10 | 000000000 | 00000 |
| No. 8 | 0.165" | 0.285" | 0.006" | 0.053" | Rockwell C40 | 10 | 000000000 | 00000 |
| No. 10 | 0.200" | 0.300" | 0.010" | 0.061" | Rockwell C40 | 10 | 000000000 | 00000 |
| 1/4" | 0.260" | 0.485" | 0.010" | 0.070" | Rockwell C40 | 10 | 000000000 | 00000 |
316 Stainless Steel | ||||||||
| No. 0 | 0.072" | 0.170" | 0.010" | 0.050" | Rockwell C35 | 10 | 000000000 | 00000 |
| No. 2 | 0.095" | 0.130" | 0.004" | 0.040" | Rockwell C35 | 10 | 000000000 | 00000 |
| No. 4 | 0.121" | 0.240" | 0.008" | 0.056" | Rockwell C35 | 10 | 000000000 | 00000 |
| No. 6 | 0.148" | 0.270" | 0.005" | 0.062" | Rockwell C35 | 10 | 000000000 | 00000 |
| No. 8 | 0.165" | 0.285" | 0.006" | 0.053" | Rockwell C35 | 10 | 000000000 | 00000 |
| No. 10 | 0.200" | 0.300" | 0.010" | 0.061" | Rockwell C35 | 10 | 000000000 | 00000 |
| 1/4" | 0.260" | 0.485" | 0.010" | 0.070" | Rockwell C35 | 5 | 000000000 | 0000 |
Steel | ||||||||
| No. 2 | 0.098" | 0.188" | 0.005" | 0.025" | Rockwell C44 | 10 | 000000000 | 0000 |
| No. 4 | 0.125" | 0.290" | 0.005" | 0.090" | Rockwell C44 | 10 | 000000000 | 0000 |
| No. 6 | 0.160" | 0.438" | 0.008" | 0.103" | Rockwell C44 | 10 | 000000000 | 0000 |
| No. 8 | 0.185" | 0.300" | 0.005" | 0.070" | Rockwell C44 | 10 | 000000000 | 0000 |
| No. 8 | 0.193" | 0.359" | 0.012" | 0.060" | Rockwell C44 | 10 | 000000000 | 0000 |
| No. 10 | 0.203" | 0.437" | 0.010" | 0.080" | Rockwell C44 | 10 | 000000000 | 0000 |
| 1/4" | 0.269" | 0.423" | 0.008" | 0.070" | Rockwell C44 | 10 | 000000000 | 0000 |