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 5930-01-384-2232
NSN 5950-01-528-7982
NSN 5895-01-323-3686
NSN 5945-00-334-1228
NSN 5835-01-384-3206
NSN 6220-01-239-5532
NSN 5930-01-257-5987
NSN 6645-00-071-2200
NSN 5996-01-439-9480
NSN 6150-00-295-1088
NSN 5960-01-439-9517
NSN 6620-01-464-3087