{"product_id":"osg-1662700-straight-flute-tap-5-8-18-unf-left-hand-hss","title":"Osg 1662700 Straight Flute Tap 5\/8-18 Unf Left Hand Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1662700 is a straight flute tap designed to cut 5\/8-18 UNF internal left-hand threads in a range of ferrous and non-ferrous materials. Built from high-speed steel with a bright\/uncoated finish, it features 4 flutes and a plug chamfer, making it suited for through-hole tapping applications where chip evacuation proceeds in a straight path. The H3 thread limit provides a controlled tolerance fit for Class 3B thread accuracy. At 3-13\/16 inches overall length with a 1-13\/16 inch thread length, this tap is sized for standard hand or machine tapping operations performed by machinists and maintenance professionals.\u003c\/p\u003e\n\u003cp\u003eThe 1662700 is intended for use in materials including aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel. The left-hand thread direction makes it the correct choice when tapping holes that require reverse-thread fasteners, such as those used on rotating assemblies where standard right-hand threads would self-loosen. The plug chamfer style requires a pre-drilled through hole and is not suited for blind-hole applications where a bottoming tap would be required. This tap is part of OSG Series 101L and is appropriate for both manual and CNC tapping setups.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLeft-hand thread direction for reverse-thread hole applications\u003c\/li\u003e\n  \u003cli\u003e4-flute straight design for consistent chip flow in through-hole tapping\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer style for standard through-hole entry\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit for Class 3B fit tolerance control\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction compatible with steel and aluminum workpieces\u003c\/li\u003e\n  \u003cli\u003eBright\/uncoated finish suitable for use with cutting fluid on a broad range of base materials\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for tapping 5\/8-18 UNF left-hand threaded holes in aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel workpieces. Part of OSG Series 101L.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap is installed by machinists or maintenance technicians using a tap wrench, tapping head, or CNC rigid tapping cycle. Ensure the workpiece is securely fixtured and the pilot hole diameter matches the correct tap drill size for 5\/8-18 UNF before beginning. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread finish. Because this is a left-hand tap, spindle direction must be reversed from standard tapping procedures when used on power equipment.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/8-18 UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Left Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 3B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3-13\/16 inches (3.811 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1-13\/16 inches (1.362 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 2.000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.48 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.5625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.36 inches\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\u003eMaterial Application\u003c\/strong\u003e: Aluminum, Cast Aluminum, Cast Iron, High-Carbon Steel, Low-Carbon Steel, Medium-Carbon Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 101L\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.18 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: OSG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1662700\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51741043228978,"sku":"1662700","price":79.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b0bee80bf020aec3c358bcf5d78cf9e0.jpg?v=1788829055","url":"https:\/\/voomisupply.com\/products\/osg-1662700-straight-flute-tap-5-8-18-unf-left-hand-hss","provider":"Voomi Supply","version":"1.0","type":"link"}