Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 99-109-0304 found under Bearing Plain Assembly by Nato Stock Number Assigned By An. The National Stock Number assigned to this part is 3120004686455, 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 99-109-0304.