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 5999-00-536-0219
NSN 5855-01-633-1253
NSN 5985-00-281-0810
NSN 6110-01-553-0214
NSN 5960-01-021-3277
NSN 6650-01-181-6037
NSN 5925-00-642-1114
NSN 2925-01-563-7885
NSN 6620-00-140-8644
NSN 5996-00-096-7653
NSN 5935-00-010-3002
NSN 6620-01-640-6761