Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5712 found under Ring Driving by Marine And Industrial Transmissions Lt. The National Stock Number assigned to this part is 2520012334830, 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 5712.