Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number XC726 HC2B found under Regulator Thermosta by Emerson Electric Co. The National Stock Number assigned to this part is 4820015285987, 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 XC726 HC2B.