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 5930-00-686-5826
NSN 5950-01-259-4731
NSN 6130-01-160-7772
NSN 6620-01-352-5640
NSN 4140-01-131-6608
NSN 5915-00-944-7263
NSN 6240-00-902-0936
NSN 5925-01-277-1332
NSN 5990-01-517-7848
NSN 5915-00-126-4742
NSN 5985-01-603-2183
NSN 6650-01-382-8569