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 6645-01-397-7277
NSN 5855-01-175-3990
NSN 6145-01-068-7516
NSN 5925-01-238-4607
NSN 5960-01-023-5735
NSN 6110-00-560-6990
NSN 6220-01-604-9144
NSN 6610-00-900-7685
NSN 5910-01-242-9385
NSN 6150-01-361-3259
NSN 6110-01-151-7105
NSN 6150-01-063-3277