Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6774402 found under Plate Backing Clutch by E C Styberg Engineering Company. The National Stock Number assigned to this part is 2520000156681, 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 6774402.