{"product_id":"precision-twist-drill-5998768-letter-i-hss-drill-bit","title":"Precision Twist Drill 5998768 Letter I Hss Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PRECISION TWIST DRILL 5998768 is a jobber length drill bit sized to Letter I, with a decimal equivalent of 0.272 inches. Ground from high speed steel with a steam oxide coating, it runs a 135-degree split point for faster penetration and reduced walking on entry. The two-flute spiral design clears chips efficiently through the 2.875-inch flute length. With an overall length of 4.125 inches and a straight-cylindrical shank, this bit seats reliably in standard drill chucks. It carries a web-thinned, tapered web configuration and meets ANSI and NAS 907 standards, making it a heavy-duty general-purpose choice for machinists, pipefitters, and maintenance technicians who drill frequently in tough materials.\u003c\/p\u003e\u003cp\u003eThis bit is suited for production and maintenance drilling in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. The steam oxide finish helps reduce friction and provides light corrosion resistance during storage. It is appropriate for use in drill presses, CNC machining centers, and handheld power drills where a straight-shank bit is required. The 11xD flute-to-diameter ratio keeps the bit stable in deeper passes up to the maximum drilling depth of 2.875 inches. Single-piece packaging makes it easy to add to a kit or replace a worn bit without over-ordering.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLetter I size — 0.272 inches decimal equivalent\u003c\/li\u003e\n\u003cli\u003e135-degree split point reduces thrust and minimizes center-punch requirements\u003c\/li\u003e\n\u003cli\u003eSteam oxide coating lowers friction and provides light corrosion resistance\u003c\/li\u003e\n\u003cli\u003eWeb-thinned tapered web improves chip evacuation and reduces heat buildup\u003c\/li\u003e\n\u003cli\u003eMeets ANSI and NAS 907 specifications for heavy-duty general-purpose drilling\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, two-flute spiral with straight-cylindrical shank fits standard chucks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in standard drill chucks accepting a 0.272-inch straight-cylindrical shank. Suitable for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium per material codes P, M, K, N, and S.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eLicensed machinists and maintenance technicians typically install and replace jobber drill bits. Before changing a bit, power down and lock out or unplug the drilling equipment per OSHA lockout\/tagout procedures. Secure the straight shank firmly in the chuck and verify concentricity before beginning a drilling operation. Use appropriate cutting fluid for hard materials such as stainless steel or titanium to extend bit life and reduce heat.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: I\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.2720 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.125 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\u003eMaximum Drilling Depth\u003c\/strong\u003e: 2.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.2720 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.25 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\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral, Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\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 Flats\u003c\/strong\u003e: 0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Steam Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Performance\u003c\/strong\u003e: General Purpose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: R10B-R15B-R18B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, NAS 907\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble Margin\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.19 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: 5998768\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51700642218290,"sku":"5998768","price":15.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/630ae9ea750d4f4c3de41855fbe582d7_303279cc-3a5d-4bdf-aaea-88c7c8d8040c.jpg?v=1788393185","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5998768-letter-i-hss-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}