Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 308866 found under Compressor Piston Ring by Outboard Marine Corp Galesburg. The National Stock Number assigned to this part is 5120001763945, and the Federal Supply Class is 5120 Hand Tools Nonedged Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 308866.