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 5999-01-071-6962
NSN 5945-01-296-5414
NSN 5835-01-314-2781
NSN 6320-00-306-0124
NSN 5855-01-100-3272
NSN 5998-01-179-5246
NSN 5985-00-974-6360
NSN 5965-00-693-8829
NSN 2925-00-555-8836
NSN 6130-00-905-8701
NSN 6110-01-245-8062
NSN 5975-01-027-4079