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 5998-00-458-2473
NSN 5835-00-279-6626
NSN 5999-00-125-9448
NSN 6610-01-367-1640
NSN 5915-01-084-2966
NSN 4140-00-372-2947
NSN 6610-01-337-4640
NSN 5990-01-094-7740
NSN 6685-00-620-4432
NSN 6130-01-406-2264
NSN 5960-01-243-0007
NSN 5999-01-596-7894