Lightweight, compact, and precision control make these speed controls the right choice for many heavy-duty applications. These speed controls are offered with in-line and elbow construction to give the widest choice to your unique application. Locking nuts are included as standard as well as simplified mounting. Thread sizes range from M3 to 2 and are available in both inch (NPT) and metric R/Rc(PT),Flow rate can be adjusted with a flat head screwdriver,Prevents inadvertent manual operation,Meter-out and meter-in types can be visually distinguishedby the flow direction symbol on the metal body,On standard models, all brass parts are electroless nickel plated,Available in PT, NPT or G(PF) port sizes