{"product_id":"precision-twist-drill-5998831-drill-bit-letter-o-hss","title":"Precision Twist Drill 5998831 Drill Bit Letter O Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PRECISION TWIST DRILL 5998831 is a jobber length drill bit sized to Letter O (0.3160 inches decimal equivalent) designed for general-purpose hole-making in metalworking applications. Built from high speed steel with a steam oxide coating, this bit features a 118-degree standard point angle, a tapered web with web thinning for improved chip clearance, and a right-hand spiral flute configuration. Overall length is 4.5 inches with a flute length of 3.1875 inches, giving it the reach and chip evacuation capacity typical of ANSI-spec jobber series bits. Licensed HVAC technicians, machinists, pipefitters, and maintenance trades reach for jobber bits like this when drilling through ferrous and non-ferrous stock in production or field settings.\u003c\/p\u003e\n\u003cp\u003eThis bit is suited for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. It fits standard drill chucks accepting a straight-cylindrical shank of 0.3160 inches. The regular spiral and 10xD flute-to-diameter ratio make it effective for through-hole and blind-hole work in sheet metal, plate, and structural members. It ships as a single unit and carries no coolant-through capability, so external cooling or cutting fluid applied at the point is recommended when drilling harder materials.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLetter O size — 0.3160 inch decimal equivalent for precise hole sizing\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction with steam oxide coating for lubricity and mild corrosion resistance\u003c\/li\u003e\n  \u003cli\u003e118-degree standard point angle for general-purpose entry in a wide range of metals\u003c\/li\u003e\n  \u003cli\u003eTapered web with web thinning reduces thrust and improves chip flow\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut, regular spiral, 2-flute design for efficient material removal\u003c\/li\u003e\n  \u003cli\u003eStraight-cylindrical shank fits standard 3-jaw and keyed drill chucks without adapters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style general-purpose jobber drill bit compatible with any drill press, hand drill, or CNC machine tool accepting a straight-cylindrical shank of 0.3160 inches. Conforms to ANSI specification standards per Series R10-R15-R18.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis drill bit is installed by machinists, maintenance mechanics, pipefitters, and general trade professionals using standard drill chucks. Secure the shank fully in the chuck before operation and verify the workpiece is clamped or fixtured to prevent rotation. Apply cutting fluid or a suitable coolant to the cutting point when drilling stainless steel, superalloys, or titanium to extend tool life and prevent work hardening. Do not exceed the rated maximum drilling depth of 3.1875 inches in a single pass without retracting to clear chips.\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: O\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.3160 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 118 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Steam Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral (Regular)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 3.1875 inches (3-3\/16 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 3.1875 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3160 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.3125 inches (1-5\/16 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered with Web Thinning\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Non-Ferrous Metal, Superalloys and Titanium, Hard Material\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\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: R10-R15-R18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecification Designation\u003c\/strong\u003e: ANSI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.083 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: 5998831\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51693429031218,"sku":"5998831","price":15.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0d1376067efa74e57cf29a3e46baef9d_1890b9ff-4900-4750-b0b4-7af9512f0ef4.jpg?v=1788312241","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5998831-drill-bit-letter-o-hss","provider":"Voomi Supply","version":"1.0","type":"link"}