Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D-3 8 SER N0 74 found under Valve Regulating Fluid Pressure by Cashco Inc. The National Stock Number assigned to this part is 4820012208258, 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 D-3 8 SER N0 74.