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 5895-01-628-6691
NSN 5998-01-452-5356
NSN 6145-01-203-0391
NSN 6110-01-017-6907
NSN 5935-00-805-1311
NSN 6645-00-893-4190
NSN 5945-01-439-2754
NSN 5985-01-054-5561
NSN 5855-00-149-0766
NSN 6145-00-190-7489
NSN 5996-00-466-9781
NSN 4140-00-501-7833