Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TU20050-S found under Valve Ball by Haywardindl Products Inc. The National Stock Number assigned to this part is 4820005332829, 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 TU20050-S.