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 6645-01-455-8342
NSN 6130-00-795-4792
NSN 5985-00-902-3348
NSN 6650-01-463-8405
NSN 5999-01-190-5572
NSN 5990-00-782-1400
NSN 6645-01-076-4655
NSN 5945-01-512-3847
NSN 6110-00-456-2058
NSN 5960-01-495-0859
NSN 6610-01-322-1394
NSN 2925-01-527-8745