Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F3863 found under Boot Dust And Moisture Seal by Federal Mogul Corp. The National Stock Number assigned to this part is 2530001641972, 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 F3863.