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 6320-00-937-5625
NSN 5999-00-331-3411
NSN 5999-01-503-5410
NSN 6610-00-232-9485
NSN 5930-01-067-0625
NSN 6150-01-289-4579
NSN 4140-01-294-4044
NSN 6110-00-144-6763
NSN 6220-01-501-2784
NSN 6135-00-900-2139
NSN 6610-01-040-6922
NSN 5960-01-360-3639