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 6130-01-187-0886
NSN 5965-01-105-4194
NSN 6110-01-425-0135
NSN 6110-00-426-6778
NSN 6130-01-551-0717
NSN 6150-01-012-2185
NSN 6650-01-139-5238
NSN 5925-01-130-5343
NSN 5965-01-350-5105
NSN 5998-01-424-6462
NSN 5985-01-162-2645
NSN 6110-00-758-9194