Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4050517 found under Valve Flow Control by Funk Mfg Co. The National Stock Number assigned to this part is 4820012747976, 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 4050517.