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 6650-00-908-5193
NSN 6240-01-198-3897
NSN 6650-01-132-0737
NSN 6110-01-454-2595
NSN 5965-00-125-1318
NSN 5975-00-841-5857
NSN 6620-00-520-1909
NSN 6240-00-279-8716
NSN 5960-01-317-3800
NSN 4140-01-379-9738
NSN 5925-01-445-6112
NSN 5960-00-669-9793