Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 40166 found under Valve Regulating Sy by Braden Carco Gearmatic. The National Stock Number assigned to this part is 4820015481312, 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 40166.