Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SDF-50-0FU found under Furnace Warm Air by Aesys Technologies Llc. The National Stock Number assigned to this part is 4520000962790, 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 SDF-50-0FU.