4440-00-909-0575 (6AJ0308-8PC57)
4440-00-909-0575 is equivalent to manufacture part number 665-2. It is a check valve and is classified under Federal Supply Class 4440 (4440 - Driers, Dehydrators, and Anhydrators), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 4440 - Driers, Dehydrators, and Anhydrators and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.