Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T01-03G-1FFX found under Valve Check by W And O Supply Inc. The National Stock Number assigned to this part is 4820015686901, 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 T01-03G-1FFX.