NORD-LOCK 67.1-4081 Stainless Steel Lock Washer for 2 1/2 Inch Bolts - 0.28 Thickness - Heavy Duty Vibration Proof Fastener for Industrial Machinery, Automotive and Construction Applications

These two-piece washers create a wedge by locking into each other to prevent rotation in high-vibration and dynamic load environments. Wedge washers have a higher clamp load than serrated lock washers and their locking function is not affected by lubrication. Teeth on one half of the washer engage with wedges on the other when tightened, utilizing tension instead of friction to secure bolted joints.

These two-piece washers create a wedge by locking into each other to prevent rotation in