Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S4589 found under Tie Rod Steering by S And S Truck Parts Inc. The National Stock Number assigned to this part is 2530004888319, and the Federal Supply Class is 2530 Vehicular Brake Steering Axle Wheel And Track Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S4589.