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 5925-00-923-4268
NSN 5915-01-579-3196
NSN 5855-00-149-0766
NSN 6110-00-330-9168
NSN 5935-00-682-0568
NSN 5960-01-270-9018
NSN 6220-01-397-2846
NSN 6610-01-256-5485
NSN 5835-01-461-8184
NSN 5835-00-677-7731
NSN 5915-00-067-9727
NSN 5835-01-535-8470