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 6645-00-634-9317
NSN 6685-01-245-7956
NSN 6240-01-305-0908
NSN 5998-01-279-1571
NSN 5910-00-100-1496
NSN 6685-01-430-5479
NSN 5996-00-132-4203
NSN 5975-01-038-0596
NSN 5835-01-317-8700
NSN 5930-01-501-3503
NSN 6145-00-220-9933
NSN 6620-00-022-8056