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 5920-01-408-5881
NSN 6650-00-500-6455
NSN 5905-01-014-6139
NSN 5945-00-226-8560
NSN 6645-01-193-5214
NSN 6150-01-440-9628
NSN 6685-01-356-3564
NSN 6130-01-359-5359
NSN 6240-01-392-1334
NSN 5920-00-590-4192
NSN 5990-01-455-8035
NSN 5935-01-464-1076