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Lock Washers (or more properly, helical spring lock washers) look like they are broken, but are actually very short coil springs. In use, they increase a bolt's clamping force (per unit of applied torque) and help prevent loosening due to vibration, among other things. Lock washers must be used in combination with a flat washer to be effective.
|MATERIAL||Steel, Stainless 18-8|
|Washer Fits this Screw Size||5/16 in.|
|Washer Outside Diameter||37/64 in.|
|Prop 65||WARNING: This product can expose you to chemicals including Nickel which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.|