{"product_id":"osg-1121800-straight-flute-tap-7-16-14-unc-4-flutes","title":"Osg 1121800 Straight Flute Tap 7\/16-14 Unc 4 Flutes","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1121800 is a straight flute tap designed for cutting 7\/16-14 UNC internal threads in a wide range of ferrous and non-ferrous materials. Built from high-speed steel with a bright, uncoated finish, this tap features a taper chamfer that guides the tool into the hole gradually, reducing entry force and improving thread start accuracy. With 4 flutes and an H3 thread limit, it produces consistent thread tolerances suited to standard fastener fits. Overall length is 3-5\/32 inches, thread length is 1-7\/16 inches, and the shank diameter measures 0.323 inches. Machinists and toolroom professionals install this tap in manual or CNC tapping operations where straight-flute geometry suits through-hole and blind-hole applications in machinable materials.\u003c\/p\u003e\u003cp\u003eThe OSG 1121800 is suited for tapping aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The taper chamfer style makes it a practical choice for starting threads in through holes or where a gradual lead-in is preferred over plug or bottoming styles. It is commonly used in job shops, maintenance operations, and production environments where 7\/16-14 UNC fastener threads are required. The right-hand thread direction and H3 tolerance class align with standard inch-series fastener specifications across general mechanical assembly.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e7\/16-14 UNC right-hand thread form with H3 thread limit for consistent tolerance control\u003c\/li\u003e\n\u003cli\u003eTaper chamfer provides gradual thread lead-in, reducing tap breakage risk on entry\u003c\/li\u003e\n\u003cli\u003e4-flute straight design suitable for through-hole and short blind-hole tapping\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction provides good wear resistance across listed material applications\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish compatible with standard cutting fluids and tapping compounds\u003c\/li\u003e\n\u003cli\u003eNo coolant-through feature  -  intended for conventional flood or manual lubrication\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-use tap for 7\/16-14 UNC thread applications in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel per OSG Series 101.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist following standard tapping procedures. Power down or disengage the spindle before loading or removing the tap from the holder. Always apply an appropriate cutting fluid or tapping compound for the workpiece material to extend tool life and improve thread finish. Follow shop safety protocols and applicable OSHA machine guarding requirements when operating tapping equipment.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 7\/16-14 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 14\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: Taper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3-5\/32 inches (3.1575 inches decimal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1-7\/16 inches (1.071 inches decimal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.323 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.406 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.242 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.689 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, Low-Carbon Steel, Medium-Carbon Steel, High-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: 0.075 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: OSG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1121800\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51742884692274,"sku":"1121800","price":36.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2674788fda57a43ca1a573a5a146fcbd.jpg?v=1788840216","url":"https:\/\/voomisupply.com\/products\/osg-1121800-straight-flute-tap-7-16-14-unc-4-flutes","provider":"Voomi Supply","version":"1.0","type":"link"}