3a 1st end bulkhead thread class 12 1st end bulkhead thread quantity per inch grumman 1-10 aircraft anodize inside surface treated unj 1st end bulkhead thread series
Used on aircraft, starlifter c-141. 3a 1st end thread class 12 1st end thread quantity per inch weapon system essential anodize inside surface treated unj 1st end thread series
Used on ea-6b prowler aircraft. 3a 3rd end bulkhead thread class 12 3rd end bulkhead thread quantity per inch anodize surface treated unj 3rd end bulkhead thread series