Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5816 found under Bearing Assembly Stern Tube by Irobot Corporation. The National Stock Number assigned to this part is 3120016240750, 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 5816.