Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12Y4518 found under Bearing Sleeve by Walter Motor Truck Co. The National Stock Number assigned to this part is 3120007063734, 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 12Y4518.