Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DG4V-3-20-MWH40 found under Valve Rotary Selector by Aircraft Technical Development Inc. The National Stock Number assigned to this part is 4820015748640, 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 DG4V-3-20-MWH40.