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 5935-00-161-4718
NSN 6150-01-165-2089
NSN 4140-01-490-2647
NSN 5975-00-312-1410
NSN 5945-01-316-2653
NSN 6130-01-044-5436
NSN 6105-00-232-6702
NSN 4140-01-133-2626
NSN 5996-01-581-9337
NSN 5905-01-324-3056
NSN 6645-01-218-3549
NSN 5996-01-506-4213