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 5925-01-085-1981
NSN 6110-01-386-3093
NSN 6610-01-496-6758
NSN 5905-01-320-6930
NSN 7035-01-457-5645
NSN 5985-01-437-3108
NSN 5965-00-665-2156
NSN 6130-00-495-9176
NSN 6145-00-617-4032
NSN 6650-01-275-5469
NSN 6145-01-622-9730
NSN 2925-00-242-4516