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 5998-00-863-0202
NSN 5910-00-874-1048
NSN 5985-01-332-9117
NSN 5835-01-632-6627
NSN 6645-00-056-1580
NSN 5998-00-925-8649
NSN 6220-01-111-9730
NSN 6650-00-164-7480
NSN 5920-00-391-6252
NSN 6130-01-265-2767
NSN 6320-00-238-9973
NSN 6145-01-641-1405