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 6110-00-181-9544
NSN 5985-00-242-2684
NSN 5935-00-782-9562
NSN 6320-01-652-3806
NSN 5895-00-067-9058
NSN 6685-00-826-6191
NSN 5925-00-647-3469
NSN 6320-00-925-0558
NSN 6135-01-067-8331
NSN 5905-00-469-3080
NSN 6135-01-110-9470
NSN 5855-01-184-8089