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 6150-00-216-6542
NSN 5998-00-332-4223
NSN 5930-01-074-6693
NSN 5999-01-185-6604
NSN 5925-00-318-3023
NSN 5999-00-840-6094
NSN 4140-00-707-5963
NSN 2925-01-327-3069
NSN 5855-00-118-8762
NSN 5945-00-841-7979
NSN 2925-00-530-3673
NSN 5945-00-334-1228