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 6320-01-481-7322
NSN 6220-00-760-9199
NSN 5935-00-484-0479
NSN 5945-00-329-9572
NSN 6150-00-248-3866
NSN 5895-00-264-2047
NSN 5975-00-636-4910
NSN 5975-01-589-2440
NSN 5915-00-410-1870
NSN 5965-01-195-2168
NSN 5920-01-063-8250
NSN 5915-01-496-8869