Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TBX050PAK found under Valve Ball by Haywardindl Products Inc. The National Stock Number assigned to this part is 4820015250649, 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 TBX050PAK.