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 6105-01-255-4028
NSN 5996-01-447-1418
NSN 6650-01-565-8316
NSN 5945-01-593-1912
NSN 6145-01-361-5842
NSN 5960-01-381-8475
NSN 6610-00-727-0882
NSN 5905-01-094-3636
NSN 6320-00-511-7331
NSN 6610-01-591-4374
NSN 6320-00-809-5744
NSN 6610-01-406-4985