Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2637040-01-3 found under Valve Actuator by Tri Tec Manufacturing Llc. The National Stock Number assigned to this part is 4810016008591, 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 2637040-01-3.