3a 3rd end thread class 12 1st end bulkhead thread quantity per inch j denotes corrosion resistant steel, type 304 passivate surface treated unj 1st end bulkhead thread series
Used on aircraft, f-16 (fighting falcon). 3a 2nd end thread class 12 1st end bulkhead thread quantity per inch weapon system essential passivate surface treated unj 1st end bulkhead thread series
3a 2nd end thread class 12 1st end thread quantity per inch first end bulkhead, unj, 1.312 in. thd size, 3a class anodize surface treated unj 1st end thread series