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 6620-01-386-5543
NSN 6610-01-134-4516
NSN 5965-00-393-1294
NSN 4140-01-230-7027
NSN 5996-01-322-4838
NSN 6620-01-072-9372
NSN 5895-01-623-1295
NSN 6650-01-313-9636
NSN 5945-01-425-2761
NSN 5998-01-607-1067
NSN 6645-00-960-6594
NSN 5920-01-450-7364