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 6620-01-322-0018
NSN 6320-01-585-8468
NSN 6610-00-446-2880
NSN 5905-01-261-9516
NSN 5975-00-063-3736
NSN 6135-01-412-5836
NSN 5999-01-472-2269
NSN 5950-00-420-3642
NSN 6240-01-562-5500
NSN 6220-00-761-9520
NSN 5935-01-384-3796
NSN 5835-00-546-4898