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 5910-00-779-6646
NSN 6135-00-885-6003
NSN 2925-01-448-2880
NSN 5960-01-134-4099
NSN 5996-00-196-1913
NSN 5998-00-419-8584
NSN 7035-01-281-3642
NSN 5935-00-340-2809
NSN 5905-00-192-3973
NSN 6110-01-398-1502
NSN 6150-01-508-6420
NSN 4140-01-292-6917