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 5990-00-277-3763
NSN 5855-00-337-3679
NSN 5905-00-983-6014
NSN 6650-00-484-3616
NSN 5996-01-432-1145
NSN 5895-00-096-5187
NSN 6135-01-174-4863
NSN 5945-00-174-0810
NSN 5835-00-034-4976
NSN 5999-01-168-8788
NSN 5950-01-130-0246
NSN 5920-01-015-2458