Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3120-99-606 found under Bearing Plain Assembly by Nato Stock Number Assigned By An. The National Stock Number assigned to this part is 3120004531162, 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 3120-99-606.