Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FW1139 found under Cone And Rollers Tapered Roller by Dorsey Trailers Inc. The National Stock Number assigned to this part is 3110001424363, and the Federal Supply Class is 3110 Bearings Antifriction Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like FW1139.