{"product_id":"precision-twist-drill-5998391-3-8-inch-hss-jobber-drill-bit","title":"Precision Twist Drill 5998391 3\/8 Inch Hss Jobber Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PRECISION TWIST DRILL 5998391 is a jobber-length drill bit designed for general-purpose drilling in metal and alloy workpieces. Built from high-speed steel (HSS) with a bright uncoated finish, this bit features a 118-degree standard point angle and a regular spiral flute geometry that efficiently clears chips during through-hole and blind-hole operations. At 0.375 inches in diameter with a 5-inch overall length and a 3.625-inch flute length, it fits standard drill chucks without adapters. The web-thinned, tapered-web construction reduces entry resistance and extends cutting life across a range of base metals. Licensed HVAC technicians, plumbers, and electricians reach for this bit when drilling access or mounting holes in ferrous and non-ferrous substrates during field installations.\u003c\/p\u003e\n\u003cp\u003eThis drill bit is suited for drilling into steel, cast iron, non-ferrous metals, superalloys, and titanium in both shop and field environments. Its straight-cylindrical shank seats securely in standard 3-jaw chucks on corded or cordless drills and drill presses. The 10xD flute-to-diameter ratio provides adequate chip evacuation depth for most trade applications, including panel knockouts, pipe routing holes, bracket mounting, and equipment anchoring. It is a single-piece, individually packaged bit from the R10H-R18H series.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e3\/8 inch (0.3750 inch) diameter with matching straight-cylindrical shank for secure chuck engagement\u003c\/li\u003e\n  \u003cli\u003e118-degree standard point angle with web-thinned, tapered-web construction for reduced drilling force\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction — suitable for steel, cast iron, non-ferrous metals, superalloys, and titanium\u003c\/li\u003e\n  \u003cli\u003eRegular right-hand spiral flute with 3.625-inch flute length and 10xD flute-by-diameter ratio for efficient chip clearing\u003c\/li\u003e\n  \u003cli\u003eBright uncoated finish; no coolant-through requirement — compatible with dry drilling or standard cutting fluids\u003c\/li\u003e\n  \u003cli\u003eANSI-compliant jobber-length geometry; Series R10H-R18H general-purpose classification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose jobber-length drill bit for use in standard 3-jaw drill chucks accepting a 3\/8 inch straight-cylindrical shank. Suitable for drilling steel, cast iron, non-ferrous metals, superalloys, and titanium per ANSI specification.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis bit is installed by a qualified tradesperson using a corded or cordless drill or drill press with a 3-jaw or keyless chuck rated for the shank diameter. Secure the workpiece before drilling and verify chuck tightness to prevent bit slippage. When drilling hard metals such as cast iron or superalloys, use an appropriate cutting fluid and moderate feed pressure to prevent overheating and premature edge wear. Inspect the cutting edges before each use and replace the bit if chipping or dulling is observed.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 3.625 inches (3-5\/8 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.375 inches (1-3\/8 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 3.625 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\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Regular Spiral\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\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\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: Bright \/ Uncoated\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\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 10xD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: R10H-R18H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: ANSI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel, Cast Iron, Non-Ferrous Metal, Superalloys and Titanium\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: 5998391\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51694404469042,"sku":"5998391","price":22.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ac335c1d53632e99459aa82e5500dfd1_2dadf481-8104-4566-a06e-3c0818b819c9.jpg?v=1788324135","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5998391-3-8-inch-hss-jobber-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}