Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R411MC found under Regulator Compressed Gas by Esab Group Inc. The National Stock Number assigned to this part is 4820003440808, 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 R411MC.