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 6130-00-761-1094
NSN 6645-00-922-8312
NSN 6145-01-549-3370
NSN 5998-01-596-9268
NSN 6150-01-424-4384
NSN 5975-01-227-4441
NSN 5960-00-946-2760
NSN 5999-01-445-6085
NSN 5998-00-052-1715
NSN 7035-00-390-6917
NSN 5925-01-425-7854
NSN 6145-01-535-7923