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 5960-01-293-6624
NSN 5925-01-557-6895
NSN 5996-00-251-9173
NSN 6130-00-852-0279
NSN 6130-00-131-3651
NSN 5835-01-163-4215
NSN 6145-01-592-3297
NSN 6105-01-455-4264
NSN 5905-00-936-4977
NSN 6145-01-285-4983
NSN 5905-01-505-5089
NSN 6620-01-425-2750