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 5990-01-540-1619
NSN 6105-01-260-0177
NSN 6620-01-011-3449
NSN 5996-00-285-3727
NSN 5996-01-360-3263
NSN 6240-01-319-8145
NSN 7035-01-422-4642
NSN 5998-00-916-7482
NSN 5930-01-239-8834
NSN 5950-01-323-3750
NSN 5996-00-868-2543
NSN 6650-01-539-4720