Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R431000498 found under Diaphragm Valve Fla by Aventics Ltd. The National Stock Number assigned to this part is 4820010284613, 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 R431000498.