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 5895-01-540-2398
NSN 6650-00-395-8712
NSN 5910-01-308-5043
NSN 5895-00-778-2946
NSN 6105-01-415-7579
NSN 4140-01-057-4152
NSN 5945-01-254-1729
NSN 6620-01-161-8039
NSN 6110-01-165-6122
NSN 6240-01-447-3199
NSN 4140-01-501-6031
NSN 6220-01-162-7954