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 4140-01-270-1067
NSN 5915-00-331-7769
NSN 5996-00-226-5364
NSN 5945-00-155-4290
NSN 6650-00-064-7199
NSN 5950-01-645-4986
NSN 5835-01-447-2544
NSN 5996-01-128-8802
NSN 5925-00-142-0752
NSN 6685-00-143-7281
NSN 6130-00-267-9970
NSN 6650-01-045-5494