{"product_id":"osg-1170400-straight-flute-tap-1-4-28-unf-plug-hss","title":"Osg 1170400 Straight Flute Tap 1\/4-28 Unf Plug Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1170400 is a straight flute tap designed for cutting internal 1\/4-28 UNF right-hand threads in a range of ferrous and non-ferrous materials. It features a plug chamfer with 3 flutes and is manufactured from high-speed steel with a bright, uncoated finish. The H3 thread limit holds tight tolerances for a 3B class of fit, making it well suited for production tapping where consistent thread quality is required. Overall length is 2.5 inches with a thread length of 1 inch, keeping the tool compact for use in standard machine or hand-tapping setups. Machinists, tool and die workers, and maintenance technicians are the primary users.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for threading operations in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The straight flute geometry works effectively in through-holes and in materials that produce short, breakable chips. It is a fit for general-purpose shop use, maintenance and repair operations, and light production environments where 1\/4-28 UNF fastener threads are required. The plug chamfer provides a gradual thread entry over several leading threads, reducing starting torque compared to a bottoming style.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-28 UNF thread form with right-hand cutting direction\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer for easy thread entry and reduced starting torque\u003c\/li\u003e\n  \u003cli\u003e3 straight flutes for chip clearance in short-chipping materials\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit for consistent 3B class-of-fit threads\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction with bright, uncoated finish\u003c\/li\u003e\n  \u003cli\u003eCompact 2.5-inch overall length suits hand and machine tapping\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard tap holders and machine spindles accepting a 0.255-inch shank diameter. Compatible with aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel workpieces per manufacturer material application data.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eSecure the tap in a properly sized tap holder or chuck before beginning. Always back off the tap periodically to break chips and apply appropriate cutting fluid for the workpiece material. Ensure the workpiece is firmly clamped and the tap is started square to the hole to prevent tap breakage. Follow shop safety procedures and use eye protection when tapping.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-28 UNF\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: 28\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 Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.255 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.3125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.191 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.1811 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\u003eSeries\u003c\/strong\u003e: 103\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.03 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: 1170400\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51740670951730,"sku":"1170400","price":24.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c30802ccb0ec6d8d74db4449244597e4_f20fd8a9-fbd1-4743-b586-505996f1c9fb.jpg?v=1788826613","url":"https:\/\/voomisupply.com\/products\/osg-1170400-straight-flute-tap-1-4-28-unf-plug-hss","provider":"Voomi Supply","version":"1.0","type":"link"}