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 5920-01-620-9524
NSN 6145-01-401-3713
NSN 5990-00-836-2542
NSN 5999-01-239-3432
NSN 5905-01-418-8401
NSN 5925-01-455-6400
NSN 6110-01-122-8110
NSN 5945-00-031-2593
NSN 5925-00-905-5135
NSN 7035-01-076-4067
NSN 5915-00-472-1092
NSN 5999-01-551-9804