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 5999-01-383-2027
NSN 5920-01-268-2188
NSN 2925-01-517-3495
NSN 6145-00-006-8438
NSN 5925-01-485-3159
NSN 6610-01-072-3447
NSN 5975-01-464-2867
NSN 6650-01-237-4689
NSN 5996-01-466-2825
NSN 5965-01-461-4480
NSN 5985-00-952-6626
NSN 6650-01-628-6956