Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12C3-2B found under Core Assembly Fluid Heater Indus by Ellis And Watts International Llc. The National Stock Number assigned to this part is 4420000032812, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 12C3-2B.