Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1210C1431-2 found under Track Bearing by Martin Marietta Technologies Inc. The National Stock Number assigned to this part is 3110012003628, 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 1210C1431-2.