Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B58W1 found under Parts Kit Universal Joint by Neapco Inc. The National Stock Number assigned to this part is 2520008420766, 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 B58W1.