Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12137 found under Coupling Actuator Handwheel Valv by Bw Elliott Manufacturing Co Llc. The National Stock Number assigned to this part is 4820011249082, 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 12137.