Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4S9049 found under Rim Assembly Track by Caterpillar Inc. The National Stock Number assigned to this part is 2530009490397, 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 4S9049.