3a 1st end thread class 2 2nd end bolt hole quantity 3a 1st end thread quantity per inch w/one lock wire hole 0.062 in. id located 1.625 from flared end enamel outside surface treated un 1st end thread series
3a first fluid end connection thread class 4.210" overall length 12 first fluid end connection thread quantity per inch cadmium surface treated coupling assembly un first fluid end connection thread series
2a 1st end thread class 14 1st end thread quantity per inch 0.8145 in.min, 0.8166 in. max.pitch dia of thd first end anodize surface treated unf 2nd end thread series
