Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1154 found under Bearing Sleeve by Ott Brothers Manufacturing Coinc. The National Stock Number assigned to this part is 3120006626233, and the Federal Supply Class is 3120 Bearings Plain Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1154.