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 5960-01-411-5899
NSN 5920-01-590-9191
NSN 5920-01-160-6050
NSN 5975-01-231-9669
NSN 6320-01-425-1417
NSN 5960-00-077-1828
NSN 5915-01-142-7832
NSN 5945-01-508-4344
NSN 6220-01-360-5525
NSN 5975-01-425-1268
NSN 5965-00-553-6898
NSN 2925-01-139-5144