Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M81749-1 found under Gear Operator Valve by Transdigm Inc. The National Stock Number assigned to this part is 4820013405948, 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 M81749-1.