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 5965-00-977-5658
NSN 6650-00-276-9838
NSN 5999-01-380-9237
NSN 5855-01-435-5548
NSN 5910-01-129-5112
NSN 6610-00-242-3160
NSN 5930-00-797-6262
NSN 5996-01-400-0917
NSN 6135-00-248-4102
NSN 5960-01-344-2604
NSN 5930-01-294-1461
NSN 6620-01-606-8964