Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5031 found under Cone And Rollers Tapered Roller by Metadure Parts And Sales Inc. The National Stock Number assigned to this part is 3110001000726, 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 5031.