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About Washers
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Square Washers
Square washers fit into slots and channels and have flat sides to keep them from rotating. They are wider and thicker than most round washers, making them good for distributing heavy loads.
Black-oxide steel washers are mildly corrosion resistant in dry environments.
Zinc-plated steel washers are corrosion resistant in wet environments.
Galvanized steel washers are 10 times as corrosion resistant as zinc-plated steel washers.
For technical drawings and 3-D models, click on a part number.
Black-Oxide Steel
| For Screw Size | ID | Wd. | Thick. | Hardness | Each | |
| 1/4" | 0.312" | 2.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| 3/8" | 0.438" | 2.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 0000 |
| 7/16" | 0.500" | 2.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 0000 |
| 1/2" | 0.562" | 2.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 0000 |
| 1/2" | 0.562" | 3.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| 5/8" | 0.688" | 2.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 0000 |
| 5/8" | 0.688" | 3.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| 5/8" | 0.688" | 4.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| 3/4" | 0.812" | 2.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 0000 |
| 3/4" | 0.812" | 3.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| 3/4" | 0.812" | 4.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| 7/8" | 0.938" | 2.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 0000 |
| 7/8" | 0.938" | 3.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| 7/8" | 0.938" | 4.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| 1" | 1.062" | 2.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 0000 |
| 1" | 1.062" | 3.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| 1" | 1.062" | 4.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| 1 1/4" | 1.312" | 3.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| 1 1/4" | 1.312" | 4.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| 1 1/2" | 1.562" | 3.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| 1 1/2" | 1.562" | 4.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| 1 3/4" | 1.938" | 3.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 0000 |
| 1 3/4" | 1.938" | 4.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| 2" | 2.062" | 4.000" | 0.235"-0.265" | Rockwell 15N80 | 000000000 | 00000 |
| M6 | 9.000mm | 50.000mm | 5.970mm-6.730mm | Rockwell 15N80 | 000000000 | 0000 |
| M8 | 11.000mm | 50.000mm | 5.970mm-6.730mm | Rockwell 15N80 | 000000000 | 0000 |
| M10 | 13.000mm | 50.000mm | 5.970mm-6.730mm | Rockwell 15N80 | 000000000 | 0000 |
| M12 | 16.000mm | 50.000mm | 5.970mm-6.730mm | Rockwell 15N80 | 000000000 | 0000 |
| M14 | 18.000mm | 50.000mm | 5.970mm-6.730mm | Rockwell 15N80 | 000000000 | 0000 |
| M16 | 22.000mm | 50.000mm | 5.970mm-6.730mm | Rockwell 15N80 | 000000000 | 0000 |
| M20 | 26.000mm | 50.000mm | 5.970mm-6.730mm | Rockwell 15N80 | 000000000 | 0000 |
| M22 | 28.000mm | 50.000mm | 5.970mm-6.730mm | Rockwell 15N80 | 000000000 | 0000 |
| M24 | 32.000mm | 50.000mm | 5.970mm-6.730mm | Rockwell 15N80 | 000000000 | 0000 |
| M30 | 38.000mm | 50.000mm | 5.970mm-6.730mm | Rockwell 15N80 | 000000000 | 0000 |
Zinc-Plated Steel
| For Screw Size | ID | Wd. | Thick. | Hardness | Pkg. Qty. | Pkg. | |
| 1/4" | 0.312" | 0.750" | 0.110"-0.130" | Rockwell B40 | 10 | 000000000 | 00000 |
| 1/4" | 0.312" | 2.000" | 0.225"-0.265" | Rockwell B40 | 5 | 000000000 | 00000 |
| 5/16" | 0.375" | 0.875" | 0.120"-0.140" | Rockwell B40 | 10 | 000000000 | 0000 |
| 5/16" | 0.375" | 1.750" | 0.125"-0.145" | Rockwell B40 | 5 | 000000000 | 00000 |
| 5/16" | 0.375" | 2.000" | 0.125"-0.145" | Rockwell B40 | 5 | 000000000 | 00000 |
| 3/8" | 0.438" | 1.000" | 0.120"-0.140" | Rockwell B40 | 10 | 000000000 | 0000 |
| 3/8" | 0.438" | 1.500" | 0.115"-0.135" | Rockwell B40 | 5 | 000000000 | 00000 |
| 3/8" | 0.438" | 2.000" | 0.110"-0.140" | Rockwell B40 | 5 | 000000000 | 00000 |
| 3/8" | 0.438" | 2.000" | 0.225"-0.265" | Rockwell B40 | 5 | 000000000 | 00000 |
| 1/2" | 0.562" | 1.375" | 0.170"-0.200" | Rockwell B40 | 10 | 000000000 | 0000 |
| 1/2" | 0.562" | 2.000" | 0.025"-0.040" | Rockwell B40 | 5 | 000000000 | 00000 |
| 1/2" | 0.562" | 2.000" | 0.105"-0.135" | Rockwell B40 | 5 | 000000000 | 00000 |
| 1/2" | 0.562" | 2.000" | 0.225"-0.265" | Rockwell B40 | 5 | 000000000 | 00000 |
| 1/2" | 0.562" | 3.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 00000 |
| 5/8" | 0.688" | 1.750" | 0.170"-0.200" | Rockwell B40 | 5 | 000000000 | 0000 |
| 5/8" | 0.688" | 2.000" | 0.112"-0.128" | Rockwell B40 | 1 | 000000000 | 0000 |
| 5/8" | 0.688" | 2.000" | 0.225"-0.265" | Rockwell B40 | 5 | 000000000 | 00000 |
| 5/8" | 0.688" | 3.000" | 0.225"-0.265" | Rockwell B40 | 5 | 000000000 | 00000 |
| 5/8" | 0.688" | 4.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 00000 |
| 3/4" | 0.812" | 2.000" | 0.225"-0.265" | Rockwell B40 | 5 | 000000000 | 00000 |
| 3/4" | 0.813" | 2.000" | 0.112"-0.128" | Rockwell B40 | 1 | 000000000 | 0000 |
| 3/4" | 0.813" | 3.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 00000 |
| 3/4" | 0.813" | 4.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 00000 |
| 7/8" | 0.938" | 2.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 0000 |
| 7/8" | 0.938" | 3.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 0000 |
| 7/8" | 0.938" | 4.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 00000 |
| 1" | 1.062" | 1.750" | 0.225"-0.265" | Rockwell B40 | 5 | 000000000 | 00000 |
| 1" | 1.062" | 2.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 0000 |
| 1" | 1.062" | 3.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 0000 |
| 1" | 1.062" | 4.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 00000 |
| 1 1/4" | 1.312" | 2.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 0000 |
| 1 1/4" | 1.312" | 2.500" | 0.110"-0.140" | Rockwell B40 | 5 | 000000000 | 00000 |
| 1 1/4" | 1.312" | 3.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 0000 |
| 1 1/4" | 1.312" | 4.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 00000 |
| 1 1/2" | 1.562" | 3.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 0000 |
| 1 1/2" | 1.562" | 4.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 00000 |
| 1 3/4" | 1.812" | 3.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 0000 |
| 1 3/4" | 1.812" | 4.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 0000 |
| 2" | 2.062" | 4.000" | 0.220"-0.280" | Rockwell B40 | 1 | 000000000 | 00000 |
Galvanized Steel
| For Screw Size | ID | Wd. | Thick. | Hardness | Each | |
| 3/8" | 0.438" | 2.000" | 0.235"-0.265" | Rockwell B40 | 000000000 | 00000 |
| 1/2" | 0.562" | 2.000" | 0.235"-0.265" | Rockwell B40 | 000000000 | 0000 |
| 1/2" | 0.562" | 3.000" | 0.235"-0.265" | Rockwell B40 | 000000000 | 0000 |
| 5/8" | 0.688" | 2.000" | 0.235"-0.265" | Rockwell B40 | 000000000 | 0000 |
| 5/8" | 0.688" | 3.000" | 0.235"-0.265" | Rockwell B40 | 000000000 | 0000 |
| 5/8" | 0.688" | 4.000" | 0.235"-0.265" | Rockwell B40 | 000000000 | 00000 |
| 3/4" | 0.812" | 2.000" | 0.235"-0.265" | Rockwell B40 | 000000000 | 0000 |
| 3/4" | 0.812" | 3.000" | 0.235"-0.265" | Rockwell B40 | 000000000 | 0000 |
| 3/4" | 0.812" | 4.000" | 0.235"-0.265" | Rockwell B40 | 000000000 | 00000 |
| 7/8" | 0.938" | 2.000" | 0.235"-0.265" | Rockwell B40 | 000000000 | 0000 |
| 7/8" | 0.938" | 3.000" | 0.235"-0.265" | Rockwell B40 | 000000000 | 0000 |
| 7/8" | 0.938" | 4.000" | 0.235"-0.265" | Rockwell B40 | 000000000 | 00000 |
| 1" | 1.062" | 3.000" | 0.235"-0.265" | Rockwell B40 | 000000000 | 0000 |
| 1" | 1.062" | 4.000" | 0.235"-0.265" | Rockwell B40 | 000000000 | 00000 |