Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1247 found under Key Fan Drive Pulle by Dw Hercules Llc. The National Stock Number assigned to this part is 5315010289921, and the Federal Supply Class is 5315 Nails Machine Keys And Pins. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1247.