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 5895-01-559-0237
NSN 6110-01-576-3316
NSN 5855-01-546-6954
NSN 7035-01-466-1577
NSN 5920-00-348-9134
NSN 6685-01-443-3284
NSN 6220-01-027-1294
NSN 5915-00-595-8090
NSN 5895-01-293-2343
NSN 6685-01-660-7851
NSN 5925-01-194-5532
NSN 6110-00-713-3693