Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7649B010 found under Valve Butterfly by Smith E L And Sons Co. The National Stock Number assigned to this part is 4810013705356, 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 7649B010.