3b all ends thread class fleet ballistic missile quality as identified by quality control no. poso 913474 cadmium surface treated unjf all ends thread series
3a 2nd end thread class fleet ballistic missile quality as identified by quality control no.POSO913448 passivate surface treated anpt 1st end thread series
surface finish is type v with colorless passivate-72hrs salt spray, zinc plating is of 25 ?m, class is 150 zinc inside surface treated npt 1st end thread series