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 5925-01-145-0074
NSN 7035-01-344-0209
NSN 5855-01-350-2454
NSN 6130-00-403-2044
NSN 5950-00-008-4480
NSN 5990-01-400-3299
NSN 5998-00-024-9494
NSN 5990-00-752-2126
NSN 5950-00-399-1037
NSN 6135-01-554-4281
NSN 6105-01-274-0617
NSN 6240-01-363-8258