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 6685-01-083-6634
NSN 5855-00-482-9876
NSN 5915-01-063-7561
NSN 4140-00-095-6452
NSN 6130-01-262-0693
NSN 5965-01-119-1898
NSN 6220-01-210-5401
NSN 5990-00-337-1331
NSN 6240-00-703-6614
NSN 6650-01-591-3342
NSN 5935-00-288-5973
NSN 6145-00-855-4468