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 6220-01-634-0660
NSN 5855-01-406-4821
NSN 4140-01-514-8490
NSN 5975-00-503-4697
NSN 6145-00-011-2390
NSN 6685-01-409-2748
NSN 6320-01-496-4605
NSN 6150-01-373-6257
NSN 6150-01-525-7556
NSN 6620-01-350-5103
NSN 5930-00-734-6138
NSN 6620-01-213-8772