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 6105-00-255-5927
NSN 5998-00-050-3711
NSN 6645-01-516-4720
NSN 6150-01-191-2911
NSN 5910-00-339-2198
NSN 6620-00-876-0776
NSN 5835-01-116-2369
NSN 5930-00-405-4115
NSN 5945-01-552-1127
NSN 6130-00-649-8671
NSN 5998-00-466-2646
NSN 5855-01-573-5035