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 5855-01-255-1688
NSN 5925-00-888-1380
NSN 6110-01-363-8375
NSN 5985-01-471-7581
NSN 5855-01-420-0851
NSN 6620-00-280-2874
NSN 5975-01-476-0583
NSN 6130-00-042-7952
NSN 5945-00-198-3890
NSN 5935-00-995-0197
NSN 5835-01-048-8106
NSN 6650-01-068-3186