6620-00-365-8717 (83-8-69)
6620-00-365-8717 is equivalent to manufacture part number 531-1. It is a gauge and is classified under Federal Supply Class 6620 (6620 - Engine Instruments), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 6620 - Engine Instruments and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.