Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 45XS8-316 found under Valve Flow Control by Whitey Co. The National Stock Number assigned to this part is 4820004045648, 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 45XS8-316.