High Collar Lock Washers have a smaller OD (outside diameter) and are thicker than standard lock washers. These are the lock washer of choice for socket head cap screws (hex head) and 12 point bolts. Great for valve cover bolts, header bolts, carb adapters etc. Machined from high carbon 1065 steel and then hardened for added strength. 12/pkg.
1/4" High Collar Lock Washers