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 6105-01-189-5020
NSN 5905-01-634-0595
NSN 5905-01-037-5449
NSN 6130-00-081-9879
NSN 4140-01-067-0533
NSN 5930-00-449-5560
NSN 2925-01-525-8212
NSN 5920-00-180-4278
NSN 6620-00-619-7769
NSN 5960-01-089-6625
NSN 6110-01-290-5342
NSN 5915-00-289-6692