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.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.
Black-oxide steel washers are mildly corrosion resistant in dry 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.
For Screw Size | ID | Wd. | Thick. | Hardness | Each | |
M6 | 9.000mm | 50.000mm | 6.000mm | Rockwell B84 | 000000000 | 000000 |
M8 | 11.000mm | 50.000mm | 6.000mm | Rockwell B84 | 000000000 | 00000 |
M10 | 13.000mm | 50.000mm | 6.000mm | Rockwell B84 | 000000000 | 00000 |
M12 | 16.000mm | 50.000mm | 6.000mm | Rockwell B84 | 000000000 | 00000 |
M14 | 18.000mm | 50.000mm | 6.000mm | Rockwell B84 | 000000000 | 00000 |
M16 | 22.000mm | 50.000mm | 6.000mm | Rockwell B84 | 000000000 | 00000 |
M20 | 26.000mm | 50.000mm | 6.000mm | Rockwell B84 | 000000000 | 00000 |
M22 | 28.000mm | 50.000mm | 6.000mm | Rockwell B84 | 000000000 | 00000 |
M24 | 32.000mm | 50.000mm | 6.000mm | Rockwell B84 | 000000000 | 00000 |
M30 | 38.000mm | 50.000mm | 6.000mm | Rockwell B84 | 000000000 | 00000 |
For Screw Size | ID | Wd. | Thick. | Hardness | Each | |
M6 | 9.000mm | 50.000mm | 6.000mm | Rockwell 15N80 | 000000000 | 00000 |
M8 | 11.000mm | 50.000mm | 6.000mm | Rockwell 15N80 | 000000000 | 0000 |
M10 | 13.000mm | 50.000mm | 6.000mm | Rockwell 15N80 | 000000000 | 0000 |
M12 | 16.000mm | 50.000mm | 6.000mm | Rockwell 15N80 | 000000000 | 0000 |
M14 | 18.000mm | 50.000mm | 6.000mm | Rockwell 15N80 | 000000000 | 0000 |
M16 | 22.000mm | 50.000mm | 6.000mm | Rockwell 15N80 | 000000000 | 0000 |
M20 | 26.000mm | 50.000mm | 6.000mm | Rockwell 15N80 | 000000000 | 0000 |
M22 | 28.000mm | 50.000mm | 6.000mm | Rockwell 15N80 | 000000000 | 0000 |
M24 | 32.000mm | 50.000mm | 6.000mm | Rockwell 15N80 | 000000000 | 0000 |
M30 | 38.000mm | 50.000mm | 6.000mm | Rockwell 15N80 | 000000000 | 0000 |
For Screw Size | ID | Wd. | Thick. | Hardness | Each | |
M6 | 9.000mm | 50.000mm | 6.000mm | Rockwell B40 | 000000000 | 00000 |
M8 | 11.000mm | 50.000mm | 6.000mm | Rockwell B40 | 000000000 | 0000 |
M10 | 13.000mm | 50.000mm | 6.000mm | Rockwell B40 | 000000000 | 0000 |
M12 | 16.000mm | 50.000mm | 6.000mm | Rockwell B40 | 000000000 | 0000 |
M14 | 18.000mm | 50.000mm | 6.000mm | Rockwell B40 | 000000000 | 0000 |
M16 | 22.000mm | 50.000mm | 6.000mm | Rockwell B40 | 000000000 | 00000 |
M20 | 26.000mm | 50.000mm | 6.000mm | Rockwell B40 | 000000000 | 00000 |
M22 | 28.000mm | 50.000mm | 6.000mm | Rockwell B40 | 000000000 | 00000 |
M24 | 32.000mm | 50.000mm | 6.000mm | Rockwell B40 | 000000000 | 00000 |
M30 | 38.000mm | 50.000mm | 6.000mm | Rockwell B40 | 000000000 | 00000 |
Metric Spring Lock Washers
The arched shape of these washers presses up against a bolt and down against a nut to prevent loosening from wear, vibration, or temperature changes. Similar to a spring, they flatten out as pressure is applied, helping to absorb shocks. They grip bolts more tightly than split and tooth lock washers. Unlike split lock washers, which can only be tightened in one direction, these washers have a continuous body that can rotate in either direction.
Conical and curved washers are functionally the same, and are often referenced using their DIN specifications. These DIN specifications refer to slight differences in OD and thickness. DIN 6796 is the standard for conical spring lock washers, which are also known as Belleville washers.
Steel washers are stronger and more wear resistant than zinc-plated steel and stainless steel. They are best for dry environments, since moisture will cause them to rust. Zinc-plated washers have an outer layer of zinc that protects the inner steel from rust and extends the life of the washer. Similar to zinc plating, washers with a black phosphate coating are protected from rust in wet environments. They have a black finish that blends in with dark surfaces.
For technical drawings and 3-D models, click on a part number.