Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T55H40.5 found under Oven Thermal Drying Electric by Gruenberg Oven Company. The National Stock Number assigned to this part is 4430014110688, 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 T55H40.5.