Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 518-00044 found under Tailpiece Valve by Parker Hannifin Ltd. The National Stock Number assigned to this part is 4810013706547, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 518-00044.