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 6150-01-131-6301
NSN 6150-01-090-3778
NSN 5990-01-453-3552
NSN 6685-00-392-0940
NSN 6110-01-552-4642
NSN 5930-00-724-4862
NSN 6610-01-250-2811
NSN 5998-00-251-6208
NSN 5990-01-383-9780
NSN 6105-01-486-6813
NSN 5935-01-398-7726
NSN 6150-01-561-2683