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 5915-01-440-3998
NSN 5950-01-242-6083
NSN 6110-01-263-3617
NSN 7035-00-117-0418
NSN 5910-01-524-4422
NSN 4140-01-135-4617
NSN 6150-01-310-7414
NSN 5975-00-861-4422
NSN 6130-01-453-3451
NSN 6145-01-180-9419
NSN 5999-00-741-2614
NSN 7035-01-476-7787