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 4140-01-589-9725
NSN 6610-01-408-9557
NSN 5925-01-469-6068
NSN 5895-00-192-3854
NSN 5996-00-007-2750
NSN 5985-00-203-1200
NSN 5999-00-152-5009
NSN 6240-01-014-5598
NSN 5855-01-656-6808
NSN 5910-00-934-1651
NSN 6145-01-396-8803
NSN 7035-00-349-8571