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 6620-00-221-7608
NSN 5996-01-135-4989
NSN 5999-01-613-3733
NSN 6130-01-453-0630
NSN 5925-01-622-0438
NSN 6650-01-473-1355
NSN 6610-01-336-8027
NSN 6620-01-614-3591
NSN 6145-00-596-2606
NSN 6685-01-486-6584
NSN 5925-01-371-2772
NSN 6130-01-504-7567