Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3S3918I found under Guard Assembly Track by Intertractor America Corp. The National Stock Number assigned to this part is 2530004211313, 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 3S3918I.