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 5895-01-083-5200
NSN 5920-00-925-2639
NSN 5975-01-540-6134
NSN 5835-01-512-4834
NSN 5945-01-023-7061
NSN 5950-01-318-0324
NSN 5945-01-533-3941
NSN 5965-01-646-1122
NSN 5975-01-366-0881
NSN 6620-00-150-6514
NSN 5950-01-307-5856
NSN 5915-01-256-2584