Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MU1620AR found under Furnace Heat Treating Electric by Hevi Duty Electric. The National Stock Number assigned to this part is 3424000434212, and the Federal Supply Class is 3424 Metal Heat Treating And Non-Thermal Treating Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MU1620AR.