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 5975-01-045-4588
NSN 5975-01-598-5935
NSN 5999-01-319-6828
NSN 5965-01-434-4095
NSN 5950-01-104-4717
NSN 5925-00-400-4938
NSN 6650-00-864-2942
NSN 6320-01-624-0193
NSN 5855-00-149-0766
NSN 5915-00-943-1468
NSN 5985-00-102-4322
NSN 5975-00-897-9959