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 5975-01-425-2779
NSN 5930-01-094-2041
NSN 6105-00-420-2335
NSN 6620-01-406-3584
NSN 5925-01-393-3463
NSN 6240-00-485-6012
NSN 5930-00-113-7642
NSN 6685-01-501-9984
NSN 5990-01-013-3205
NSN 5999-01-312-8811
NSN 5905-01-531-7386
NSN 5998-01-651-9780