Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F120043 IT. 9 found under Dog Door Hatch by Oldenburg Group Incorporated. The National Stock Number assigned to this part is 5342015937282, 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 F120043 IT. 9.