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 5925-00-171-0307
NSN 5925-01-189-9254
NSN 5915-00-085-2408
NSN 6685-01-147-5616
NSN 6145-00-112-8578
NSN 5925-01-101-1857
NSN 5935-01-660-9973
NSN 6240-00-170-5302
NSN 6650-01-075-6642
NSN 6105-00-525-8639
NSN 6105-01-181-4503
NSN 6610-01-290-2627