3460-01-677-5740 (820-8355131PC11(180))
3460-01-677-5740 is equivalent to manufacture part number 180. It is a lapping block and is classified under Federal Supply Class 3460 (3460 - Machine Tool Accessories), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 3460 - Machine Tool Accessories and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.