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 5935-01-273-2526
NSN 6150-00-456-0775
NSN 5998-01-063-7803
NSN 5990-01-287-9447
NSN 5990-00-362-1453
NSN 6240-00-347-7118
NSN 5965-00-735-9315
NSN 5998-00-174-8104
NSN 5910-00-817-8533
NSN 5960-01-215-0992
NSN 5930-01-518-2011
NSN 5945-00-905-5749