Using the Request for Quote (RFQ) form provided on this page, you can request competitive procurement options on part number 8440 with rapid responses always offered by our staff. To ensure that you locate and procure exactly what you need with ease, we list parts with as much information as we can. For example, part number 8440 It is listed as Valve Toggle Oxygen. component manufactured by Essex Industries Inc Div Manufa, specifically under CAGE Code 88535. It is also accompanied by the NSN 1660001508952 for ease of organization, the first digits of the NSN indicating that the part belongs to FSC 1660 Aircraft Air Conditioning Heating and Pressurizing Equipment.