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 6135-00-246-0324
NSN 5985-00-931-2564
NSN 5990-00-539-7859
NSN 5905-00-116-6171
NSN 5985-01-450-9712
NSN 5905-00-293-2596
NSN 6145-01-401-3713
NSN 5950-01-518-3976
NSN 5935-01-494-3801
NSN 5998-00-957-1795
NSN 4140-01-210-3119
NSN 5910-01-116-4420