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 6110-00-353-0139
NSN 5835-00-145-8926
NSN 5930-00-278-7731
NSN 6150-00-706-4736
NSN 6105-01-255-2402
NSN 6320-01-512-2031
NSN 5965-01-178-7853
NSN 6685-01-023-1272
NSN 2925-01-143-0092
NSN 7035-01-366-5912
NSN 6610-01-204-9146
NSN 5915-01-319-6462