Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MD3-038BB038BBC found under Bearing Sleeve by Jered Brown Bros Inc. The National Stock Number assigned to this part is 3120003393104, 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 MD3-038BB038BBC.