Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4375-02 found under Parts Kit Pilot Control Valve by Watts Automatic Control Valve Inc. The National Stock Number assigned to this part is 4820014784389, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4375-02.