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 6620-00-468-3665
NSN 5855-00-118-8762
NSN 5835-01-545-6467
NSN 5945-01-248-6161
NSN 5998-00-848-8669
NSN 7035-01-459-8268
NSN 5990-01-243-4233
NSN 5960-01-413-3877
NSN 6240-00-541-7032
NSN 2925-01-175-1217
NSN 5895-01-607-7544
NSN 5998-01-320-7655