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 6645-01-591-3970
NSN 5835-01-482-1591
NSN 6105-00-246-5899
NSN 5895-01-175-1347
NSN 5915-01-067-8365
NSN 5920-00-362-1376
NSN 5996-01-449-0666
NSN 6130-01-301-7684
NSN 6110-01-495-7010
NSN 5965-01-116-1886
NSN 6620-00-253-6329
NSN 6685-01-263-7054