{"product_id":"precision-twist-drill-6001238-aircraft-extension-drill","title":"Precision Twist Drill 6001238 Aircraft Extension Drill","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PRECISION TWIST DRILL 6001238 is a wire-gauge aircraft extension drill bit engineered for demanding drilling applications in aerospace, automotive, and general metalworking environments. Built from high speed steel with an oxide finish, this bit features a 135-degree split point that is self-centering, reducing walking and the need for a center punch on most metal surfaces. The straight-cylindrical shank measures 0.177 inches in diameter and mates reliably with standard chucks. At 12 inches in overall length with a 2.1875-inch spiral flute, this extension drill reaches deep or recessed bore locations that standard-length bits cannot access. Installed by machinists, maintenance technicians, and aircraft sheet-metal mechanics working within NAS 907 Type B standards.\u003c\/p\u003e\u003cp\u003eThis drill bit is suited for production and repair work where reach is critical — blind holes, structural framing, deep cavities, and aerospace skin drilling are common applications. The extended length makes it particularly useful when working through fixtures, guides, or layered assemblies where a standard jobber-length bit falls short. The 2-flute spiral design with tapered web and web-thinned geometry promotes efficient chip evacuation in both ferrous and non-ferrous materials. Right-hand cutting direction is standard for conventional drilling setups.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e135-degree split point for self-centering entry without a center punch on most metals\u003c\/li\u003e\n\u003cli\u003eWire size 16 (0.177 inches) straight-cylindrical shank for secure chuck engagement\u003c\/li\u003e\n\u003cli\u003e12-inch overall length provides extended reach into deep or restricted bore locations\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction with oxide finish for wear resistance in general-purpose metal drilling\u003c\/li\u003e\n\u003cli\u003e2-flute spiral geometry with tapered, web-thinned web for efficient chip removal\u003c\/li\u003e\n\u003cli\u003eMeets NAS 907 Type B standards — suitable for aerospace and precision metalworking applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and production drill bit for use with standard straight-shank drill chucks in aircraft extension drilling applications conforming to NAS 907 Type B specifications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use of this drill bit should be performed by qualified machinists or aircraft sheet-metal mechanics familiar with proper speeds and feeds for high speed steel tooling in the applicable work material. Secure the shank fully in the chuck and verify runout before drilling. Avoid excessive feed pressure, which can cause bit deflection at extended length or premature cutting-edge failure. Follow applicable workplace safety and aviation maintenance standards when drilling structural components.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Wire)\u003c\/strong\u003e: 16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal)\u003c\/strong\u003e: 0.177 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 12 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.1875 inches (2-3\/16 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.177 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 135 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Split\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-Centering\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: Web-Thinned\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: Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Performance\u003c\/strong\u003e: General Purpose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 501-12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: NAS 907 Type B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.042 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: PRECISION TWIST DRILL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 6001238\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51722490872114,"sku":"6001238","price":30.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/da3496e4617881f200db3c68936287ae_1995108f-9b3c-4224-820f-f869534744ec.jpg?v=1788591895","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-6001238-aircraft-extension-drill","provider":"Voomi Supply","version":"1.0","type":"link"}