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 6130-01-513-0597
NSN 5920-01-262-1667
NSN 5998-01-125-5780
NSN 5985-01-241-8742
NSN 6610-00-692-4460
NSN 5910-01-469-2463
NSN 5835-01-442-6482
NSN 6110-00-647-3932
NSN 5950-00-399-5155
NSN 5835-00-148-9719
NSN 5915-01-417-2058
NSN 7035-00-225-6499