{"product_id":"value-collection-gh8830283-counterbore-7-16-in-4-flute-hss","title":"Value Collection GH8830283 Counterbore 7\/16 in 4 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION GH8830283 is a 4-flute interchangeable pilot counterbore designed for precision countersinking and seat-facing operations in metal fabrication and aircraft-style applications. The body measures 7\/16 inches in diameter with a 5\/16-inch straight shank and an overall length of 4 inches. Constructed from high speed steel with a bright, uncoated polished finish, this tool delivers consistent cutting performance in right-hand rotation. It accepts a 1\/8-inch pilot shank for guided, on-center cutting. Machinists, tool-and-die workers, and aerospace maintenance technicians will find this counterbore suited to demanding close-tolerance work.\u003c\/p\u003e\u003cp\u003eThis counterbore is used in applications where a flat-bottomed recess is required around a bolt hole or fastener seat. The aircraft-style designation indicates compatibility with aerospace and precision sheet-metal work where interchangeable pilots allow a single body to serve multiple pilot diameters. It is appropriate for use on ferrous and non-ferrous metals in both production shop and maintenance, repair, and overhaul settings. The interchangeable pilot design reduces tooling inventory and allows quick changeover between pilot sizes on the bench or at the machine.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e7\/16-inch counterbore diameter for standard fastener seat applications\u003c\/li\u003e\n\u003cli\u003e4-flute geometry for smooth, chatter-resistant cutting action\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction for durability across ferrous and non-ferrous materials\u003c\/li\u003e\n\u003cli\u003eBright, uncoated polished finish — no coating to affect dimensional tolerance\u003c\/li\u003e\n\u003cli\u003eInterchangeable pilot system accepts 1\/8-inch pilot shank\u003c\/li\u003e\n\u003cli\u003eAircraft-style design meets precision fabrication and MRO requirements\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style interchangeable pilot counterbore compatible with standard 1\/8-inch pilot shanks; accepts pilots used in aircraft-style counterbore systems requiring a 7\/16-inch seat diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tool is installed by machinists and precision metalworkers using a drill press, mill, or hand-held power tool with a 5\/16-inch straight-shank chuck. Ensure the workpiece is securely clamped before operation and that the correct pilot is seated fully before beginning the cut. Use appropriate cutting fluid for the material being worked to extend tool life and improve finish quality. Do not exceed the recommended RPM range for the material and cutter diameter.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCounterbore Diameter\u003c\/strong\u003e: 7\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 5\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePilot Shank Diameter Compatibility\u003c\/strong\u003e: 1\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright, Uncoated, Polished\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAircraft Style\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: VALUE COLLECTION\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: GH8830283\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51714269315378,"sku":"GH8830283","price":104.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/fa71562e82b77832617d971ea8243fe0.jpg?v=1788498624","url":"https:\/\/voomisupply.com\/products\/value-collection-gh8830283-counterbore-7-16-in-4-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}