Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4S5050 found under Guard Sprocket by Caterpillar Inc. The National Stock Number assigned to this part is 2410012152275, and the Federal Supply Class is 2410 Tractor Full Tracked Low Speed. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4S5050.