Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X18303 found under Valve Linear Directional Control by Beatrice Foods Co. The National Stock Number assigned to this part is 4820011626585, 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 X18303.