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 5920-01-616-6431
NSN 6135-01-204-8712
NSN 5965-00-387-6880
NSN 6105-01-459-7902
NSN 6650-01-364-8194
NSN 6620-01-100-0431
NSN 5920-01-522-9747
NSN 5905-01-468-9625
NSN 6110-00-502-2391
NSN 5905-00-929-2587
NSN 5935-01-632-8264
NSN 5960-01-167-8796