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 5935-01-472-2461
NSN 6145-01-475-2723
NSN 5996-01-042-0484
NSN 6145-01-502-3246
NSN 5975-01-162-6221
NSN 5855-00-138-2386
NSN 5999-01-181-5469
NSN 7035-01-495-7134
NSN 5975-01-284-2708
NSN 5950-01-292-0069
NSN 6685-00-151-5257
NSN 5990-01-525-2250