Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5F40-3452 found under Main Bearing Seal E by Carrier Corporation. The National Stock Number assigned to this part is 3120011686646, 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 5F40-3452.