Used on wichita class aor. 3a 1st end bulkhead thread class 12 1st end bulkhead thread quantity per inch passivate surface treated unj 1st end bulkhead thread series
Used on grumman a10a aircraft;catapult/arresting gear. 3a 1st end bulkhead thread class weapon system essential anodize surface treated unjf all ends thread series
Used on airplane, reconnaissance, utility, ru-21. 3a 3rd end bulkhead thread class 12 3rd end bulkhead thread quantity per inch anodize surface treated unj 3rd end bulkhead thread series
Used on f-16 aircraft. 3a 3rd end bulkhead thread class 12 3rd end bulkhead thread quantity per inch passivate inside surface treated unj 3rd end bulkhead thread series