Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NSTDSIZE2-1-2 found under Heater Convection Steam Hot Wate by Modine Manufacturing Company. The National Stock Number assigned to this part is 4520002731124, 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 NSTDSIZE2-1-2.