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Tight-Grip External-Tooth Lock Washers
The teeth on these washers bite further into the screw head and joint than standard external-tooth washers to provide a stronger hold. Use with fasteners that have heads large enough to make contact with the teeth, such as pan, button, and binding head screws.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.
Zinc-plated steel washers are corrosion resistant in wet environments.
For technical drawings and 3-D models, click on a part number.
| For Screw Size  | ID, mm | OD, mm | Thick., mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| M2 | 2.2 | 4.5 | 0.2-0.4 | Not Rated | DIN 6798 | 100 | 000000000 | 00000 |
| M2.5 | 2.7 | 5.5 | 0.3-0.5 | Not Rated | DIN 6798 | 100 | 000000000 | 0000 |
| M3 | 3.2 | 6.0 | 0.3-0.5 | Not Rated | DIN 6798 | 100 | 000000000 | 0000 |
| M4 | 4.3 | 8.0 | 0.4-0.6 | Not Rated | DIN 6798 | 100 | 000000000 | 0000 |
| M5 | 5.3 | 10.0 | 0.5-0.7 | Not Rated | DIN 6798 | 100 | 000000000 | 0000 |
| M6 | 6.4 | 11.0 | 0.6-0.8 | Not Rated | DIN 6798 | 100 | 000000000 | 0000 |
| M8 | 8.4 | 15.0 | 0.7-0.9 | Not Rated | DIN 6798 | 100 | 000000000 | 0000 |
| M10 | 10.5 | 18.0 | 0.8-1.0 | Not Rated | DIN 6798 | 100 | 000000000 | 00000 |
| M12 | 13.0 | 20.5 | 0.9-1.2 | Not Rated | DIN 6798 | 50 | 000000000 | 0000 |
| M16 | 17.0 | 26.0 | 1.0-1.4 | Not Rated | DIN 6798 | 50 | 000000000 | 0000 |
| M20 | 21.0 | 33.0 | 1.2-1.5 | Not Rated | DIN 6798 | 10 | 000000000 | 0000 |
| M24 | 25.0 | 38.0 | 1.4-1.6 | Not Rated | DIN 6798 | 10 | 000000000 | 0000 |
Zinc-Plated Steel | ||||||||
| M3 | 3.2 | 6.0 | 0.4-0.5 | Rockwell C35 | DIN 6798 | 100 | 000000000 | 0000 |
| M4 | 4.3 | 8.0 | 0.5-0.6 | Rockwell C35 | DIN 6798 | 100 | 000000000 | 0000 |
| M5 | 5.3 | 10.0 | 0.6-0.7 | Rockwell C35 | DIN 6798 | 100 | 000000000 | 0000 |
| M6 | 6.4 | 11.0 | 0.7-0.8 | Rockwell C35 | DIN 6798 | 100 | 000000000 | 0000 |
| M8 | 8.4 | 15.0 | 0.8-0.9 | Rockwell C35 | DIN 6798 | 100 | 000000000 | 0000 |
| M10 | 10.5 | 18.0 | 0.9-1.0 | Rockwell C35 | DIN 6798 | 50 | 000000000 | 0000 |
| M12 | 13.0 | 20.5 | 1.0-1.2 | Rockwell C35 | DIN 6798 | 50 | 000000000 | 0000 |
Countersunk Tight-Grip External-Tooth Lock Washers
To keep 90° countersunk screws from loosening in vibration applications, the teeth on these washers bite further into the screw head and joint than standard external-tooth lock washers for a more secure hold. Made of zinc-plated steel, these washers resist corrosion in wet environments. All meet DIN dimensional standards.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID, mm | OD, mm | Thickness, mm | Countersink Angle | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| M3 | 3.2 | 6.0 | 0.15-0.25 | 90° | Rockwell C35 | DIN 6798 | 100 | 00000000 | 000000 |
| M4 | 4.3 | 8.0 | 0.20-0.30 | 90° | Rockwell C35 | DIN 6798 | 100 | 00000000 | 00000 |
| M5 | 5.3 | 9.8 | 0.25-0.35 | 90° | Rockwell C35 | DIN 6798 | 50 | 00000000 | 00000 |
| M6 | 6.4 | 11.8 | 0.35-0.45 | 90° | Rockwell C35 | DIN 6798 | 50 | 00000000 | 0000 |
| M8 | 8.4 | 15.3 | 0.35-0.45 | 90° | Rockwell C35 | DIN 6798 | 50 | 00000000 | 00000 |
| M10 | 10.5 | 19.0 | 0.45-0.55 | 90° | Rockwell C35 | DIN 6798 | 25 | 00000000 | 0000 |
| M12 | 13.0 | 23.0 | 0.45-0.55 | 90° | Rockwell C35 | DIN 6798 | 25 | 00000000 | 00000 |