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 6650-00-763-7457
NSN 6130-01-056-2097
NSN 6150-00-065-8417
NSN 5996-00-176-0999
NSN 7035-00-803-3056
NSN 6650-00-150-6885
NSN 5998-01-287-2767
NSN 6320-01-155-8295
NSN 5999-01-319-3345
NSN 6110-01-187-5807
NSN 5945-01-376-7915
NSN 2925-01-394-9658