self locking washer for sale, brand-new and used.

I googled the patent number and found the following info. The figures on the patent sketches looks slightly different than the piece. Patent number: US 3497806

14BF3312 up for sale is a set of 3 special squash head lock nuts used on the military HMMWV and other military equipment, this has a 7/16-20 thread inside.

D and J's UNIQUE ITEM's

The Disc-Lock Stainless Steel Washer, specifically designed to solve the problem of fastener failure, is a heavy duty structural self-locking product, which prevents loosening caused by shock or vibration in high stress applications.