The ZG-M4 screw kit for characterized control valves (CCV) replacements of 2-way and 3-way, 1/2" to 2". The ZG-M4 screw kit includes a M4 assembly screw for the following actuators: TR, LR, AR, TF, LF, AFR and phased out AF series. Washers for the TR, LR, AR and AFR are included in the kit.