Elliptical locking feature id
A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 6135-01-054-2462
NSN 2925-00-373-8837
NSN 6150-00-552-4629
NSN 5905-01-311-1821
NSN 4140-00-279-3148
NSN 6240-01-501-5688
NSN 6135-00-838-0706
NSN 5975-01-340-0557
NSN 6145-01-463-7128
NSN 6650-00-999-3566
NSN 5910-01-365-0093
NSN 5920-01-634-0250