Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 306-6845 found under Engine Block Assembly Diesel by Caterpillar Inc. The National Stock Number assigned to this part is 2815015948800, and the Federal Supply Class is 2815 Diesel Engines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 306-6845.