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 5998-01-055-7678
NSN 6610-01-417-3011
NSN 6105-01-232-5262
NSN 6240-01-468-6408
NSN 5915-00-597-2369
NSN 5990-01-138-8981
NSN 7035-01-116-6223
NSN 6650-01-551-4124
NSN 5999-01-219-3123
NSN 5905-00-410-9246
NSN 5960-01-008-5670
NSN 6135-00-451-0709