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 5975-01-389-2261
NSN 6610-00-531-8871
NSN 5835-00-334-6556
NSN 6620-00-150-6514
NSN 6610-01-406-4985
NSN 5925-01-066-4452
NSN 5910-00-167-5485
NSN 5895-00-753-5349
NSN 6320-01-246-4390
NSN 5855-00-821-7512
NSN 6650-00-962-3568
NSN 6220-01-568-2671