Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2 72 34057 4412 found under Valve Check by Voith Turbo Inc. The National Stock Number assigned to this part is 4820123363271, 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 2 72 34057 4412.