Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 117A64 found under Valve Vent by United Air Filter Company. The National Stock Number assigned to this part is 4820000223073, 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 117A64.