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 4140-00-283-6843
NSN 5999-01-605-3050
NSN 6150-01-314-6062
NSN 5915-01-604-2947
NSN 6610-00-679-4835
NSN 6320-00-115-0883
NSN 5998-00-956-3464
NSN 7035-00-349-8571
NSN 5996-01-547-7386
NSN 6240-00-771-2263
NSN 5950-00-088-2711
NSN 5910-01-161-3256