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 6650-01-037-9755
NSN 5910-01-244-0026
NSN 6105-01-143-7884
NSN 5945-01-384-9448
NSN 5945-01-553-9540
NSN 5975-01-573-3980
NSN 6145-00-423-1563
NSN 5998-00-385-9007
NSN 6685-00-709-1695
NSN 5920-01-543-2938
NSN 5935-01-623-6505
NSN 5910-01-203-6817