Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B1004 found under Cone And Rollers Tapered Roller by Allis Chalmers Corp. The National Stock Number assigned to this part is 3110001000282, 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 B1004.