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 5835-00-770-2843
NSN 5920-01-159-4055
NSN 6610-01-096-8746
NSN 5996-01-413-0229
NSN 6105-01-634-0322
NSN 5998-01-323-5761
NSN 5950-01-111-8960
NSN 5910-01-142-5815
NSN 5835-00-833-7080
NSN 6610-00-508-1728
NSN 6105-00-731-7384
NSN 5965-01-428-2458