3a first fluid end connection thread class 4.696" overall length 12 first fluid end connection thread quantity per inch anodize surface treated coupling assembly un first fluid end connection thread series
3a 1st end thread class 20 1st end thread quantity per inch 1 center hole 0.065 in min dia, 0.075 in max dia each side of wrench ing facility uns 1st end thread series
3a first fluid end connection thread class 5.715" overall length 12 first fluid end connection thread quantity per inch anodize surface treated coupling assembly un first fluid end connection thread series
3a first fluid end connection thread class 4.540" overall length anodize surface treated coupling assembly unf first fluid end connection thread series