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 5935-00-387-6679
NSN 6130-00-596-9565
NSN 6650-01-632-3135
NSN 6105-00-930-1878
NSN 5975-01-259-9007
NSN 5950-01-395-9554
NSN 5935-01-285-6071
NSN 5835-01-608-8868
NSN 5965-00-961-1627
NSN 6240-00-594-7138
NSN 6145-00-237-8141
NSN 5998-01-224-7193