Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B7631 found under Shaft Axle Automoti by Pettibone Llc. The National Stock Number assigned to this part is 2520008758395, 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 B7631.