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 5960-01-319-6735
NSN 5998-01-121-8155
NSN 6135-01-041-3829
NSN 5945-01-276-6263
NSN 6110-01-301-7382
NSN 6150-00-284-2976
NSN 6320-01-643-0850
NSN 6620-01-135-7846
NSN 5945-00-528-1920
NSN 6150-01-503-7920
NSN 6135-01-394-4160
NSN 5990-01-187-8594