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 6130-01-558-2212
NSN 5935-01-411-1858
NSN 6130-01-465-1080
NSN 5996-01-197-1688
NSN 6145-01-481-4195
NSN 6610-00-010-9714
NSN 5998-00-062-9579
NSN 5925-00-223-1842
NSN 5996-01-038-8474
NSN 6130-01-179-7564
NSN 5915-00-484-8585
NSN 6650-01-302-3488