{"product_id":"precision-twist-drill-6001281-letter-f-aircraft-extension-drill","title":"Precision Twist Drill 6001281 Letter F Aircraft Extension Drill","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PRECISION TWIST DRILL 6001281 is a Letter F aircraft extension drill bit designed for deep-reach drilling in metalworking and aerospace maintenance applications. Built from high speed steel with an oxide finish, it features a 135-degree split point that is self-centering and eliminates the need for a center punch on most surfaces. The straight-cylindrical shank measures 0.257 inches in diameter and the spiral flute length runs 2.875 inches, giving technicians extended reach into confined or recessed bore locations. The web-thinned, tapered web configuration reduces thrust and improves chip evacuation during extended drilling cycles. This is a general-purpose tool suited for professional machinists, aircraft maintenance technicians, and heavy fabrication crews.\u003c\/p\u003e\n\u003cp\u003eThis drill bit is built for applications requiring extended reach beyond the capacity of standard-length drill bits. Typical use cases include aircraft structural work, deep-hole drilling in sheet metal assemblies, and production drilling in fabrication shops where workpiece geometry prevents the use of jobber-length drills. The 4xD flute-to-diameter ratio provides adequate chip clearance during through-hole drilling in aluminum, mild steel, and similar materials. The Series 502-6 designation places this bit within a recognized family of aircraft-grade extension drills. It meets NAS 907 Type B standards, making it appropriate for regulated aerospace and defense maintenance environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLetter F sizing at 0.257 inches diameter for precise hole sizing without reaming in many applications\u003c\/li\u003e\n  \u003cli\u003e135-degree split point is self-centering and reduces walking on entry\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction with oxide finish for corrosion resistance and reduced friction\u003c\/li\u003e\n  \u003cli\u003e2.875-inch spiral flute length with 4xD ratio supports efficient chip removal in deep holes\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned tapered web reduces cutting thrust and extends tool life\u003c\/li\u003e\n  \u003cli\u003eMeets NAS 907 Type B standards for aerospace and defense maintenance use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and standard-fit extension drill for applications requiring a Letter F diameter straight-shank bit conforming to NAS 907 Type B specifications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall and remove drill bits only with the machine powered down and the spindle fully stopped. Secure the straight-cylindrical shank firmly in a keyed or keyless chuck rated for the shank diameter before applying any load. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole quality. Follow applicable shop safety standards and any relevant aerospace maintenance manual procedures when drilling structural components.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal)\u003c\/strong\u003e: 0.257 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.875 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 135 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.257 inches\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\u003ePoint Type\u003c\/strong\u003e: Split\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered 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\u003eSeries\u003c\/strong\u003e: 502-6\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\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 6001281\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51705874481458,"sku":"6001281","price":23.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0fc899d1bf6115334f340b397e07558e_f219e459-a3cf-478b-b3c7-22233e27a3fc.jpg?v=1788431602","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-6001281-letter-f-aircraft-extension-drill","provider":"Voomi Supply","version":"1.0","type":"link"}