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 5990-01-256-8441
NSN 5950-00-844-0672
NSN 5960-01-142-1995
NSN 5910-01-075-3391
NSN 5930-00-988-2074
NSN 6135-01-220-7193
NSN 7035-01-131-1168
NSN 6150-01-393-0621
NSN 6620-00-049-4613
NSN 5975-00-420-8986
NSN 5935-01-078-1665
NSN 5930-01-090-6756