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 6240-01-079-3704
NSN 5960-01-381-4692
NSN 6610-01-461-1644
NSN 5930-01-274-5994
NSN 5925-01-113-7793
NSN 5975-00-956-6105
NSN 5925-01-401-5314
NSN 6650-00-372-0669
NSN 6150-01-168-8290
NSN 5905-01-592-5517
NSN 5945-00-935-8657
NSN 5985-00-566-5815