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 6145-00-752-2562
NSN 6150-01-502-0402
NSN 5905-01-557-4737
NSN 6240-01-386-5952
NSN 5960-01-605-9921
NSN 5930-00-171-8867
NSN 4140-01-631-4447
NSN 5975-00-168-7661
NSN 6220-00-179-2653
NSN 5960-00-824-0052
NSN 4140-00-610-5169
NSN 5895-01-090-6802