Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MCH-344-OP found under Valvepneumatic Inflator by Milton Industries Inc. The National Stock Number assigned to this part is 4820016776202, 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 MCH-344-OP.