Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 018-90004 found under Engine Diesel by Kovatch Corp. The National Stock Number assigned to this part is 2815012749570, 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 018-90004.