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 5895-01-441-0256
NSN 6240-01-417-7978
NSN 5935-01-579-4634
NSN 6150-01-062-1459
NSN 5999-00-515-7354
NSN 5895-00-717-6158
NSN 6320-01-393-7022
NSN 6130-01-012-4840
NSN 6110-00-257-1446
NSN 6650-00-011-3435
NSN 6220-01-460-6982
NSN 6620-00-795-0330