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 5945-01-450-4840
NSN 5998-01-632-9281
NSN 6685-01-533-6362
NSN 6105-01-608-5217
NSN 5935-01-521-4463
NSN 6220-00-622-3572
NSN 5998-01-556-8056
NSN 5910-01-658-3406
NSN 6650-00-272-2271
NSN 5975-01-372-5819
NSN 6105-01-408-5467
NSN 5835-00-946-2656