Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 23C28004-29 found under Disc Plenum Support by Air Cruisers Company Llc. The National Stock Number assigned to this part is 4910013793581, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 23C28004-29.