Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 55378 found under Control Assembly Tr by Orscheln Products Llc. The National Stock Number assigned to this part is 2520219063932, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 55378.