Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F137002HF1B found under Valve Regulating Fluid Pressure by American Society For Testing And. The National Stock Number assigned to this part is 4820001818958, 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 F137002HF1B.