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 5998-00-894-6285
NSN 6620-01-492-8470
NSN 6610-01-219-1656
NSN 6135-01-573-2428
NSN 5990-01-013-8464
NSN 5950-01-086-7930
NSN 6645-00-269-2764
NSN 6320-00-886-9771
NSN 5935-01-579-2448
NSN 5945-01-446-7074
NSN 6135-00-951-3426
NSN 4140-01-619-2295