Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number JD403A4012 found under Parts Kit Cylinder by Optex Systems Inc. The National Stock Number assigned to this part is 2815000063975, 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 JD403A4012.