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 5930-01-025-1959
NSN 5895-01-115-8770
NSN 5925-00-058-4564
NSN 5910-01-631-6235
NSN 2925-01-379-0903
NSN 5985-00-418-3813
NSN 5915-01-657-1561
NSN 5975-01-088-6116
NSN 2925-01-459-8093
NSN 5935-01-503-1749
NSN 6610-01-345-1110
NSN 5835-01-559-3824