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 5945-01-301-1601
NSN 5835-00-827-1904
NSN 6685-01-297-0965
NSN 6145-00-435-9296
NSN 6105-00-539-9995
NSN 6110-01-212-5595
NSN 6645-01-580-9570
NSN 5975-01-082-1694
NSN 5998-01-361-1016
NSN 6620-01-606-8964
NSN 5855-00-316-5050
NSN 6620-00-891-1408