Gate Valve stem 2)4"API JIS Gate Valve 3)Checked by Go & No ... 3) Machining Types: Machined by Round Bar and steel plate, Drilling, Milling, Turning, Boring, Slating, Grinding,, NC/CNC Machining etc ... , ANSI, ISO etc.valve stem of 303 stainless steel4"API Gate ValveMaterial: Alloy Steel, Stainless SteelMachined from round bar by ... .NDT Test can be made before packing. JIS API lengthening Gate Valve Stem