{"product_id":"osg-1135400-straight-flute-tap-7-8-9-unc-taper-hss","title":"Osg 1135400 Straight Flute Tap 7\/8-9 Unc Taper Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1135400 is a straight flute tap designed to cut 7\/8-9 UNC internal threads in a wide range of ferrous and non-ferrous materials. It features a taper chamfer for easy thread starting, four flutes for chip evacuation, and a bright uncoated high-speed steel construction. The H4 thread limit holds close tolerances for a 3B class of fit, making it suitable for precision threading applications in machine shops, maintenance environments, and production settings. Overall length is 4-11\/16 inches with a thread length of 2-7\/32 inches. This tap is installed by machinists, toolmakers, and maintenance technicians using standard tapping equipment.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for threading operations in aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel workpieces. The taper chamfer makes it a practical choice for through-hole applications and for starting threads in blind holes where a gradual thread engagement is acceptable. It performs well in both manual tapping and machine tapping setups where coolant-through capability is not required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e7\/8-9 UNC thread form with taper chamfer for controlled thread starting\u003c\/li\u003e\n  \u003cli\u003eFour straight flutes provide chip clearance across a broad range of workpiece materials\u003c\/li\u003e\n  \u003cli\u003eH4 thread limit ensures consistent 3B class of fit tolerances\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction offers good wear resistance at standard cutting speeds\u003c\/li\u003e\n  \u003cli\u003eBright uncoated finish suitable for use with cutting fluids on steel and aluminum\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction; compatible with standard tapping attachments and tap wrenches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard tapping operations on aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel. Compatible with standard 7\/8-9 UNC tap holders and tapping attachments. Part of OSG Series 101.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eMachinists and toolmakers should ensure the workpiece is securely fixtured and the tap is properly aligned with the drilled hole before beginning the threading operation. Power down or disengage the spindle before changing taps. Apply an appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Do not reverse the tap abruptly under load, as this can cause breakage in harder materials.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 7\/8-9 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 9\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\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: H4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Taper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 2-7\/32 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 4-11\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.697 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.523 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 2.5 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: 101\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.432 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: 1135400\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51743119114546,"sku":"1135400","price":127.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/daf48cea6dcb4e3d0ec99b1efd740654.jpg?v=1788842897","url":"https:\/\/voomisupply.com\/products\/osg-1135400-straight-flute-tap-7-8-9-unc-taper-hss","provider":"Voomi Supply","version":"1.0","type":"link"}