Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number VL8643 found under Spider Universal Joint Vehicular by American Standard Inc. The National Stock Number assigned to this part is 2520007388662, 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 VL8643.