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 5999-01-441-7373
NSN 5895-00-167-1117
NSN 5996-01-107-2234
NSN 6240-01-553-7914
NSN 6685-01-261-0711
NSN 5945-00-929-7894
NSN 5895-00-707-6663
NSN 5975-01-643-7045
NSN 6610-00-186-9180
NSN 5965-00-785-5100
NSN 5910-01-418-5344
NSN 4140-00-459-1564