Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BG0502B found under Adapter Mounting by Rauland Borg Corporation. The National Stock Number assigned to this part is 3120004984812, 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 BG0502B.