Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 14170-2 found under Valve Check by Spectrum Associates Inc. The National Stock Number assigned to this part is 4820013084671, 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 14170-2.