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 6650-01-554-2824
NSN 5960-01-170-0234
NSN 5998-01-655-4433
NSN 5945-01-222-2882
NSN 6220-01-242-0046
NSN 6105-00-007-2795
NSN 4140-01-366-6666
NSN 6650-01-592-2445
NSN 4140-01-412-8049
NSN 5920-01-200-9318
NSN 5999-01-158-1562
NSN 5945-01-565-3819