{"product_id":"63-64-x-5-16-straight-shank-counterbore-3-4-round-shank-3-flute-hss_dewcbr63-64","title":"63\/64\" X 5\/16\" Straight Shank Counterbore | HSS | 3\/4\" Round Shank | 3 Flute | DEWCBR63\/64","description":"\u003cdiv\u003eIndustrial counterbore tools for precision metalworking and fastener seating. Precision 3-flute HSS counterbore with dual shank configurations for broad machine compatibility. \u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003eCounterbore diameter\u003c\/b\u003e: 63\/64 inch\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eShank diameter\u003c\/b\u003e: 5\/16 inch (Straight Shank); 3\/4 inch Round Shank\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eFlute count\u003c\/b\u003e: 3\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMaterial\u003c\/b\u003e: High Speed Steel (HSS)\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eDrive type\u003c\/b\u003e: Straight Shank; Round Shank\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003e3-flute design\u003c\/b\u003e: Balanced cutting action and efficient chip evacuation during counterboring operations in metal components.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMaterial\u003c\/b\u003e: High Speed Steel (HSS) suitable for moderate to high-speed cutting on steel, aluminum, and alloy workpieces.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eDual shank compatibility\u003c\/b\u003e: Straight Shank 5\/16 inch and Round Shank 3\/4 inch enable use across multiple machine tools and toolholding systems.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eApplication\u003c\/b\u003e: Used to create flat-bottomed recesses for flush-head fasteners in structural frames, machinery housings, and automotive components.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eDurability\u003c\/b\u003e: HSS provides reliable wear resistance under standard cutting conditions with proper lubrication and feed rates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Drill America","offers":[{"title":"Default Title","offer_id":53412336468247,"sku":"DEWCBR63\/64","price":52.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/1125\/5063\/files\/4.jpg?v=1779454687","url":"https:\/\/mutualscrew.com\/products\/63-64-x-5-16-straight-shank-counterbore-3-4-round-shank-3-flute-hss_dewcbr63-64","provider":"Mutual Screw \u0026 Supply","version":"1.0","type":"link"}