Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 436 1 2IN 50T100PSI found under Valve Regulating Fl by Warren Controls Inc. The National Stock Number assigned to this part is 4820011883600, 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 436 1 2IN 50T100PSI.