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 5835-01-117-6124
NSN 6110-01-276-0009
NSN 4140-01-086-3436
NSN 5975-00-994-9102
NSN 6220-01-207-1229
NSN 5935-01-049-9959
NSN 5960-01-051-9405
NSN 5985-01-509-9037
NSN 4140-01-175-0919
NSN 2925-00-201-8247
NSN 5935-00-198-7437
NSN 6150-00-393-0498