A hardened circular washer with twisted prongs or teeth which extend inward from the inside edge of the washer.
This style is preferred when finished appearance is crucial and the teeth must be hidden under the head of the screw
Made from spring steel, zinc plated.
Rockwell Hardness: C40-50.
Inside Diameter: Min .221 Max .231
Outside Diameter: Min .394 Max .410
Thickness: Min .020 Max .027
A hardened circular washer with twisted prongs or teeth which extend inward from the inside edge of the washer. This style is preferred when finished appea