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 5945-00-831-0382
NSN 6110-00-233-6626
NSN 4140-00-552-7370
NSN 5945-01-339-7360
NSN 6650-00-665-3658
NSN 5920-01-142-1836
NSN 6220-01-116-2411
NSN 6150-01-540-5903
NSN 5935-01-160-6168
NSN 6240-01-651-8628
NSN 6145-01-238-4979
NSN 5930-01-330-5403