3a all ends thread class 12 all ends thread quantity per inch cadmium surface treated center wrenching facility w/ threaded relief un all ends thread series
2a 2nd end thread class 12 1st end thread quantity per inch second end has groove at end before threads passivate surface treated un 2nd end bulkhead thread series
2a 2nd end thread class 12 1st end thread quantity per inch second end has a groove at end before threads passivate surface treated un 2nd end bulkhead thread series