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 2925-01-273-4898
NSN 6135-01-231-4809
NSN 2925-01-500-0730
NSN 5905-01-605-2276
NSN 5935-01-609-3931
NSN 6145-00-730-3933
NSN 5835-01-384-3206
NSN 6110-01-309-2331
NSN 5905-00-336-9097
NSN 6110-00-004-8883
NSN 7035-01-464-1213
NSN 6150-00-880-3230