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Metric General Purpose Washers
Use these metric washers to evenly distribute the load under bolt or screw heads and nuts when fastening. They can also act as spacers.
Steel washers are stronger and more wear resistant than stainless steel washers. Zinc-flake-coated and black corrosion-resistant-coated steel washers have the same level of corrosion resistance—both resist corrosion from chemicals and withstand 1,000 hours of salt spray. The black corrosion-resistant-coated steel washers have a black semi-gloss finish.
Washers that meet ISO 7089, 7090, 7091, and 7092 (formerly DIN 125, 126, and 433), meet international standards for fastener dimensions. The ISO 7091 washers have a slightly rougher surface than a typical flat washer.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID, mm | OD, mm | Thickness, mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Flake-Coated Class 8.8 Steel | ||||||||
---|---|---|---|---|---|---|---|---|
M4 | 4.3 | 9.0 | 0.7-0.9 | Rockwell B91 | DIN 125; ISO 7089 | 50 | 000000000 | 00000 |
M5 | 5.3 | 10.0 | 0.9-1.1 | Rockwell B91 | DIN 125; ISO 7089 | 50 | 000000000 | 0000 |
M6 | 6.4 | 12.0 | 1.4-1.8 | Rockwell B91 | DIN 125; ISO 7089 | 50 | 000000000 | 0000 |
M8 | 8.4 | 16.0 | 1.4-1.8 | Rockwell B91 | DIN 125; ISO 7089 | 50 | 000000000 | 00000 |
M10 | 10.5 | 20.0 | 1.8-2.2 | Rockwell B91 | DIN 125; ISO 7089 | 25 | 000000000 | 00000 |
M12 | 13.0 | 24.0 | 2.3-2.7 | Rockwell B91 | DIN 125; ISO 7089 | 10 | 000000000 | 0000 |
M14 | 15.0 | 28.0 | 2.3-2.7 | Rockwell B91 | DIN 125; ISO 7089 | 10 | 000000000 | 00000 |
M16 | 17.0 | 30.0 | 2.7-3.3 | Rockwell B91 | DIN 125; ISO 7089 | 10 | 000000000 | 00000 |
M18 | 19.0 | 34.0 | 2.7-3.3 | Rockwell B91 | DIN 125; ISO 7089 | 5 | 000000000 | 00000 |
M20 | 21.0 | 37.0 | 2.7-3.3 | Rockwell B91 | DIN 125; ISO 7089 | 5 | 000000000 | 00000 |
M24 | 25.0 | 44.0 | 3.7-4.3 | Rockwell B91 | DIN 125; ISO 7089 | 1 | 000000000 | 0000 |
M30 | 31.0 | 56.0 | 3.7-4.3 | Rockwell B91 | DIN 125; ISO 7089 | 1 | 000000000 | 00000 |
Zinc-Flake Coated Class 10.9 Steel | ||||||||
M6 | 6.4 | 12.0 | 1.4-1.8 | Rockwell B76 | DIN 125; ISO 7089 | 100 | 000000000 | 0000 |
M8 | 8.4 | 16.0 | 1.4-1.8 | Rockwell B76 | DIN 125; ISO 7089 | 100 | 000000000 | 0000 |
M10 | 10.5 | 20.0 | 1.8-2.2 | Rockwell B76 | DIN 125; ISO 7089 | 100 | 000000000 | 0000 |
M12 | 13.0 | 24.0 | 2.3-2.7 | Rockwell B76 | DIN 125; ISO 7089 | 100 | 000000000 | 00000 |
SAE Washers
SAE washers generally have a smaller ID and OD than USS washers.
Black Corrosion-resistant coated and zinc-flake-coated steel washers resist chemicals and withstand 1,000 hours of salt spray.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Flake-Coated Grade 8 Steel | ||||||||
---|---|---|---|---|---|---|---|---|
No. 6 | 0.158" | 0.380" | 0.036"-0.065" | Rockwell C38 | ASME B18.21.1 | 10 | 000000000 | 00000 |
No. 8 | 0.190" | 0.443" | 0.036"-0.065" | Rockwell C38 | ASME B18.21.1 | 10 | 000000000 | 0000 |
No. 10 | 0.221" | 0.505" | 0.036"-0.065" | Rockwell C38 | ASME B18.21.1 | 10 | 000000000 | 0000 |
1/4" | 0.281" | 0.625" | 0.055"-0.065" | Rockwell C38 | ASME B18.21.1 | 100 | 000000000 | 00000 |
5/16" | 0.344" | 0.688" | 0.055"-0.065" | Rockwell C38 | ASME B18.21.1 | 50 | 000000000 | 0000 |
3/8" | 0.406" | 0.812" | 0.055"-0.065" | Rockwell C38 | ASME B18.21.1 | 50 | 000000000 | 0000 |
7/16" | 0.469" | 0.922" | 0.055"-0.065" | Rockwell C38 | ASME B18.21.1 | 25 | 000000000 | 0000 |
1/2" | 0.531" | 1.062" | 0.097"-0.177" | Rockwell C38 | __ | 25 | 000000000 | 00000 |
9/16" | 0.599" | 1.168" | 0.074"-0.121" | Rockwell C38 | ASME B18.21.1 | 5 | 000000000 | 0000 |
5/8" | 0.688" | 1.312" | 0.122"-0.177" | Rockwell C38 | __ | 25 | 000000000 | 00000 |
3/4" | 0.812" | 1.469" | 0.122"-0.177" | Rockwell C38 | __ | 20 | 000000000 | 00000 |
7/8" | 0.950" | 1.762" | 0.136"-0.177" | Rockwell C38 | __ | 1 | 000000000 | 0000 |
1" | 1.074" | 2.012" | 0.136"-0.177" | Rockwell C38 | ASME B18.21.1 | 1 | 000000000 | 0000 |
1 1/8" | 1.262" | 2.243" | 0.146"-0.177" | Rockwell C38 | ASME B18.21.1 | 1 | 000000000 | 0000 |
1 1/4" | 1.387" | 2.512" | 0.136"-0.177" | Rockwell C38 | ASME B18.21.1 | 1 | 000000000 | 0000 |
1 1/2" | 1.637" | 3.012" | 0.136"-0.177" | Rockwell C38 | ASME B18.21.1 | 1 | 000000000 | 0000 |
Split Lock Washers
As a screw is tightened, these 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.
These washers are compatible with fasteners that have right-hand threads to prevent clockwise rotation. The uneven split ends bite into fasteners for a tight grip, but they won’t work with hardened surfaces. These washers hold better than curved or wave washers. They are not reusable after tightening.
Zinc-flake-coated steel washers are 40 times as corrosion resistant as zinc-plated washers and comparable to Magni-coated washers.
Washers that meet ASME B18.21.1 adhere to strict dimensional standards.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Flake-Coated Steel | ||||||||
---|---|---|---|---|---|---|---|---|
No. 10 | 0.200" | 0.334" | 0.047" | Rockwell C38 | ASME B18.21.1 | 25 | 00000000 | 00000 |
1/4" | 0.260" | 0.487" | 0.062" | Rockwell C38 | ASME B18.21.1 | 25 | 00000000 | 0000 |
5/16" | 0.322" | 0.583" | 0.078" | Rockwell C38 | ASME B18.21.1 | 25 | 00000000 | 0000 |
3/8" | 0.385" | 0.680" | 0.094" | Rockwell C38 | ASME B18.21.1 | 10 | 00000000 | 0000 |
7/16" | 0.450" | 0.776" | 0.109" | Rockwell C38 | ASME B18.21.1 | 10 | 00000000 | 0000 |
1/2" | 0.512" | 0.869" | 0.125" | Rockwell C38 | ASME B18.21.1 | 10 | 00000000 | 0000 |
9/16" | 0.574" | 0.965" | 0.141" | Rockwell C38 | ASME B18.21.1 | 5 | 00000000 | 0000 |
5/8" | 0.641" | 1.073" | 0.156" | Rockwell C38 | ASME B18.21.1 | 5 | 00000000 | 0000 |
3/4" | 0.766" | 1.265" | 0.188" | Rockwell C38 | ASME B18.21.1 | 1 | 00000000 | 0000 |
7/8" | 0.894" | 1.459" | 0.219" | Rockwell C38 | ASME B18.21.1 | 1 | 00000000 | 0000 |
1" | 1.024" | 1.656" | 0.250" | Rockwell C38 | ASME B18.21.1 | 1 | 00000000 | 0000 |
1 1/4" | 1.280" | 2.036" | 0.312" | Rockwell C38 | ASME B18.21.1 | 1 | 00000000 | 00000 |
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.
Standard split lock washers have a left-hand helix that have right-hand threads to prevent clockwise rotation. They have uneven split ends that bite into fasteners for a tight grip but won’t work with hardened surfaces. They hold better than curved or wave washers. These washers are not reusable after tightening.
Stronger and more durable than stainless steel, steel washers plated with zinc or galvanized withstand varying degrees of corrosion. Zinc-flake coated steel washers resist corrosion from chemicals and have passed a 1,000-hour salt-spray test. They’re also known as armor coat and ultra coat.
For technical drawings and 3-D models, click on a part number.
Wedge Lock Washers
These two-piece washers provide more locking power than split, tooth, and spring lock washers. Wedges on the inside lock the two pieces together, and serrations on the exterior grip surfaces to resist loosening from high vibration and shifting. Washers are reusable.
Zinc-flake-coated steel washers are corrosion resistant in wet environments.
316 stainless steel and zinc-flake-coated steel washers are comparable to NORD-LOCK® Series washers.
Black zinc-flake-coated steel washers are comparable to Sherex TEC Series washers.
Spring lock washers are comparable to NORD-LOCK® X-Series washers. They withstand vibration better than standard wedge lock washers by combining the locking power of a wedge lock with the clamping force of a spring lock.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID | OD | Thick. | Washer Type | Hardness | Pkg. Qty. | Pkg. | |
Zinc-Flake-Coated Steel | ||||||||
---|---|---|---|---|---|---|---|---|
1/4" | 0.280" | 0.450" | 0.090"-0.110" | Wedge Lock | Rockwell C46 | 20 | 000000000 | 000000 |
1/4" | 0.280" | 0.530" | 0.090"-0.110" | Wedge Lock | Rockwell C46 | 20 | 000000000 | 00000 |
3/8" | 0.410" | 0.650" | 0.090"-0.100" | Spring Lock, Wedge Lock | Rockwell C46 | 1 | 000000000 | 0000 |
3/8" | 0.410" | 0.650" | 0.090"-0.110" | Wedge Lock | Rockwell C46 | 20 | 000000000 | 00000 |
3/8" | 0.410" | 0.830" | 0.090"-0.110" | Wedge Lock | Rockwell C46 | 10 | 000000000 | 00000 |
1/2" | 0.530" | 0.770" | 0.090"-0.110" | Wedge Lock | Rockwell C46 | 10 | 000000000 | 00000 |
1/2" | 0.530" | 0.770" | 0.130"-0.140" | Spring Lock, Wedge Lock | Rockwell C46 | 1 | 000000000 | 0000 |
1/2" | 0.530" | 1.000" | 0.120"-0.140" | Wedge Lock | Rockwell C46 | 8 | 000000000 | 00000 |
3/4" | 0.790" | 1.210" | 0.120"-0.140" | Wedge Lock | Rockwell C46 | 4 | 000000000 | 00000 |
3/4" | 0.790" | 1.210" | 0.210"-0.220" | Spring Lock, Wedge Lock | Rockwell C46 | 1 | 000000000 | 0000 |
3/4" | 0.790" | 1.540" | 0.120"-0.140" | Wedge Lock | Rockwell C46 | 2 | 000000000 | 0000 |
1" | 1.100" | 1.540" | 0.120"-0.140" | Wedge Lock | Rockwell C46 | 2 | 000000000 | 0000 |
1" | 1.100" | 1.910" | 0.170"-0.190" | Wedge Lock | Rockwell C46 | 1 | 000000000 | 0000 |
Black Zinc-Flake-Coated Steel | ||||||||
1/4" | 0.280" | 0.450" | 0.090"-0.110" | Wedge Lock | Rockwell C48 | 10 | 000000000 | 00000 |
1/4" | 0.280" | 0.530" | 0.090"-0.110" | Wedge Lock | Rockwell C48 | 10 | 000000000 | 00000 |
3/8" | 0.410" | 0.650" | 0.090"-0.110" | Wedge Lock | Rockwell C48 | 10 | 000000000 | 00000 |
3/8" | 0.410" | 0.830" | 0.090"-0.110" | Wedge Lock | Rockwell C48 | 5 | 000000000 | 00000 |
1/2" | 0.530" | 0.770" | 0.090"-0.110" | Wedge Lock | Rockwell C48 | 5 | 000000000 | 0000 |
1/2" | 0.530" | 1.000" | 0.120"-0.140" | Wedge Lock | Rockwell C48 | 4 | 000000000 | 00000 |
3/4" | 0.790" | 1.210" | 0.120"-0.140" | Wedge Lock | Rockwell C48 | 4 | 000000000 | 00000 |
3/4" | 0.790" | 1.540" | 0.120"-0.140" | Wedge Lock | Rockwell C48 | 2 | 000000000 | 0000 |
1" | 1.100" | 1.540" | 0.120"-0.140" | Wedge Lock | Rockwell C48 | 2 | 000000000 | 0000 |
For Screw Size | ID | OD | Thick. | Washer Type | Hardness | Pkg. Qty. | Pkg. | |
Zinc-Flake-Coated Steel | ||||||||
---|---|---|---|---|---|---|---|---|
M6 | 0.260" | 0.430" | 0.060"-0.080" | Wedge Lock | Rockwell C46 | 20 | 000000000 | 000000 |
M6 | 0.260" | 0.430" | 0.070"-0.080" | Spring Lock, Wedge Lock | Rockwell C46 | 1 | 000000000 | 0000 |
M6 | 0.260" | 0.530" | 0.090"-0.110" | Wedge Lock | Rockwell C46 | 20 | 000000000 | 00000 |
M10 | 0.420" | 0.650" | 0.090"-0.110" | Wedge Lock | Rockwell C46 | 20 | 000000000 | 00000 |
M10 | 0.420" | 0.650" | 0.100"-0.110" | Spring Lock, Wedge Lock | Rockwell C46 | 1 | 000000000 | 0000 |
M10 | 0.420" | 0.830" | 0.090"-0.110" | Wedge Lock | Rockwell C46 | 10 | 000000000 | 00000 |
M12 | 0.510" | 0.770" | 0.090"-0.110" | Wedge Lock | Rockwell C46 | 10 | 000000000 | 00000 |
M12 | 0.510" | 0.770" | 0.130"-0.130" | Spring Lock, Wedge Lock | Rockwell C46 | 1 | 000000000 | 0000 |
M12 | 0.510" | 1.000" | 0.120"-0.140" | Wedge Lock | Rockwell C46 | 8 | 000000000 | 00000 |
M18 | 0.770" | 1.140" | 0.120"-0.140" | Wedge Lock | Rockwell C46 | 4 | 000000000 | 00000 |
M18 | 0.770" | 1.360" | 0.120"-0.140" | Wedge Lock | Rockwell C46 | 2 | 000000000 | 0000 |
M20 | 0.840" | 1.210" | 0.120"-0.140" | Wedge Lock | Rockwell C46 | 4 | 000000000 | 00000 |
M20 | 0.840" | 1.210" | 0.220"-0.230" | Spring Lock, Wedge Lock | Rockwell C46 | 1 | 000000000 | 0000 |
M20 | 0.840" | 1.540" | 0.120"-0.140" | Wedge Lock | Rockwell C46 | 2 | 000000000 | 0000 |
M24 | 1.000" | 1.540" | 0.120"-0.140" | Wedge Lock | Rockwell C46 | 2 | 000000000 | 0000 |
M24 | 1.000" | 1.910" | 0.170"-0.190" | Wedge Lock | Rockwell C46 | 2 | 000000000 | 00000 |
M27 | 1.120" | 1.650" | 0.220"-0.240" | Wedge Lock | Rockwell C46 | 1 | 000000000 | 0000 |
M27 | 1.120" | 1.910" | 0.220"-0.240" | Wedge Lock | Rockwell C46 | 1 | 000000000 | 0000 |
M42 | 1.700" | 2.480" | 0.250"-0.270" | Wedge Lock | Rockwell C46 | 1 | 000000000 | 00000 |
Black Zinc-Flake-Coated Steel | ||||||||
M6 | 0.260" | 0.430" | 0.060"-0.080" | Wedge Lock | Rockwell C48 | 10 | 000000000 | 00000 |
M6 | 0.260" | 0.530" | 0.090"-0.110" | Wedge Lock | Rockwell C48 | 10 | 000000000 | 00000 |
M8 | 0.340" | 0.650" | 0.090"-0.110" | Wedge Lock | Rockwell C48 | 10 | 000000000 | 00000 |
M10 | 0.420" | 0.650" | 0.090"-0.110" | Wedge Lock | Rockwell C48 | 10 | 000000000 | 00000 |
M10 | 0.420" | 0.830" | 0.090"-0.110" | Wedge Lock | Rockwell C48 | 5 | 000000000 | 00000 |
M12 | 0.510" | 0.770" | 0.090"-0.110" | Wedge Lock | Rockwell C48 | 5 | 000000000 | 0000 |
M12 | 0.510" | 1.000" | 0.120"-0.140" | Wedge Lock | Rockwell C48 | 4 | 000000000 | 00000 |
M16 | 0.670" | 1.210" | 0.120"-0.140" | Wedge Lock | Rockwell C48 | 4 | 000000000 | 00000 |
For Screw Size | ID | OD | Thick. | Washer Type | Hardness | Pkg. Qty. | Pkg. | |
Zinc-Flake-Coated Steel | ||||||||
---|---|---|---|---|---|---|---|---|
No. 5, M3 | 0.130" | 0.280" | 0.060"-0.080" | Wedge Lock | Rockwell C46 | 20 | 000000000 | 000000 |
No. 6, M3.5 | 0.150" | 0.300" | 0.060"-0.080" | Wedge Lock | Rockwell C46 | 20 | 000000000 | 00000 |
No. 6, M3.5 | 0.150" | 0.350" | 0.060"-0.080" | Wedge Lock | Rockwell C46 | 20 | 000000000 | 00000 |
No. 8, M4 | 0.170" | 0.300" | 0.060"-0.080" | Wedge Lock | Rockwell C46 | 20 | 000000000 | 00000 |
No. 8, M4 | 0.170" | 0.350" | 0.060"-0.080" | Wedge Lock | Rockwell C46 | 20 | 000000000 | 00000 |
No. 10, M5 | 0.210" | 0.350" | 0.060"-0.080" | Wedge Lock | Rockwell C46 | 20 | 000000000 | 00000 |
No. 10, M5 | 0.210" | 0.430" | 0.060"-0.080" | Wedge Lock | Rockwell C46 | 20 | 000000000 | 00000 |
5/16", M8 | 0.340" | 0.530" | 0.080"-0.090" | Spring Lock, Wedge Lock | Rockwell C46 | 1 | 000000000 | 0000 |
5/16", M8 | 0.340" | 0.530" | 0.090"-0.110" | Wedge Lock | Rockwell C46 | 20 | 000000000 | 00000 |
5/16", M8 | 0.340" | 0.650" | 0.080"-0.090" | Spring Lock, Wedge Lock | Rockwell C46 | 1 | 000000000 | 0000 |
5/16", M8 | 0.340" | 0.650" | 0.090"-0.110" | Wedge Lock | Rockwell C46 | 20 | 000000000 | 00000 |
7/16", M11 | 0.450" | 0.730" | 0.090"-0.110" | Wedge Lock | Rockwell C46 | 10 | 000000000 | 00000 |
9/16", M14 | 0.600" | 0.910" | 0.120"-0.140" | Wedge Lock | Rockwell C46 | 10 | 000000000 | 00000 |
9/16", M14 | 0.600" | 1.210" | 0.120"-0.140" | Wedge Lock | Rockwell C46 | 4 | 000000000 | 00000 |
5/8", M16 | 0.670" | 1.000" | 0.120"-0.140" | Wedge Lock | Rockwell C46 | 8 | 000000000 | 00000 |
5/8", M16 | 0.670" | 1.000" | 0.170"-0.180" | Spring Lock, Wedge Lock | Rockwell C46 | 1 | 000000000 | 0000 |
5/8", M16 | 0.670" | 1.210" | 0.120"-0.140" | Wedge Lock | Rockwell C46 | 4 | 000000000 | 00000 |
7/8", M22 | 0.920" | 1.360" | 0.120"-0.140" | Wedge Lock | Rockwell C46 | 2 | 000000000 | 0000 |
7/8", M22 | 0.920" | 1.650" | 0.170"-0.190" | Wedge Lock | Rockwell C46 | 2 | 000000000 | 00000 |
1 1/8", M30 | 1.240" | 1.850" | 0.220"-0.240" | Wedge Lock | Rockwell C46 | 1 | 000000000 | 0000 |
1 1/8", M30 | 1.240" | 2.300" | 0.250"-0.270" | Wedge Lock | Rockwell C46 | 1 | 000000000 | 00000 |
1 1/4", M33 | 1.350" | 1.910" | 0.220"-0.240" | Wedge Lock | Rockwell C46 | 1 | 000000000 | 0000 |
1 3/8", M36 | 1.470" | 2.170" | 0.250"-0.270" | Wedge Lock | Rockwell C46 | 1 | 000000000 | 00000 |
1 1/2", M39 | 1.590" | 2.300" | 0.250"-0.270" | Wedge Lock | Rockwell C46 | 1 | 000000000 | 00000 |
1 3/4", M45 | 1.820" | 2.760" | 0.270"-0.290" | Wedge Lock | Rockwell C46 | 1 | 000000000 | 00000 |
1 7/8", M45 | 1.950" | 2.950" | 0.270"-0.290" | Wedge Lock | Rockwell C46 | 1 | 000000000 | 00000 |
2", M52 | 2.110" | 3.150" | 0.270"-0.290" | Wedge Lock | Rockwell C46 | 1 | 000000000 | 00000 |
2 1/4", M56 | 2.330" | 3.350" | 0.270"-0.290" | Wedge Lock | Rockwell C46 | 1 | 000000000 | 00000 |
2 1/2", M64 | 2.640" | 3.740" | 0.270"-0.290" | Wedge Lock | Rockwell C46 | 1 | 000000000 | 00000 |
Black Zinc-Flake-Coated Steel | ||||||||
5/16", M8 | 0.340" | 0.530" | 0.090"-0.110" | Wedge Lock | Rockwell C48 | 10 | 000000000 | 00000 |
5/8", M16 | 0.670" | 1.000" | 0.120"-0.140" | Wedge Lock | Rockwell C48 | 4 | 000000000 | 00000 |