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 5895-01-313-6638
NSN 5975-01-461-8738
NSN 5920-01-480-5778
NSN 5985-01-207-8525
NSN 5999-01-415-1215
NSN 5895-00-477-7823
NSN 6105-00-292-3112
NSN 6135-00-134-6648
NSN 2925-01-543-0073
NSN 5915-01-188-8314
NSN 5910-01-202-8330
NSN 6105-01-634-0322