Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 03950 found under Valve Regulating Fluid Pressure by Sure Marine Service Inc. The National Stock Number assigned to this part is 4820016068500, 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 03950.