4820-00-607-4510 (1287-2-1-2PC17-1043)
4820-00-607-4510 is equivalent to manufacture part number 1287-1-2PC19-1040. It is a vent plug lock cup and is classified under Federal Supply Class 4820 (4820 - Valves, Nonpowered), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 4820 - Valves, Nonpowered and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.