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 5915-01-371-9729
NSN 5855-00-149-0766
NSN 4140-00-574-1869
NSN 7035-01-501-5938
NSN 6105-01-143-4381
NSN 5975-00-137-2836
NSN 6620-00-005-5624
NSN 5998-00-862-7299
NSN 6145-01-109-2299
NSN 5999-00-892-8310
NSN 5835-00-729-9305
NSN 5910-01-016-4202