{"product_id":"osg-1012208-straight-flute-tap-4-40-unc-ticn-hss","title":"Osg 1012208 Straight Flute Tap 4-40 Unc Ticn Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1012208 is a straight flute plug tap designed to cut 4-40 UNC internal threads in a wide range of metallic workpiece materials. Manufactured from high-speed steel and finished with a titanium carbonitride (TiCN) coating, the tap offers improved surface hardness and wear resistance over uncoated HSS tooling. It features three straight flutes and a plug chamfer, making it suited for through-hole and blind-hole threading where chips can be managed manually or with coolant flush. The H2 thread limit holds tight pitch diameter control for 2B and 3B class-of-fit threads. Overall length is 1.875 inches with a thread length of 0.5625 inches (9\/16 inches).\u003c\/p\u003e\u003cp\u003eThis tap is intended for use in machine shop, maintenance, repair, and production threading operations. Typical applications include tapping aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel workpieces. It is commonly installed in CNC machining centers, drill presses, or hand-tapping fixtures. The straight flute geometry is best suited for through-holes or short blind holes where chip evacuation is not a critical constraint.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTiCN coating increases surface hardness and extends tool life versus uncoated HSS\u003c\/li\u003e\n\u003cli\u003ePlug chamfer provides a gradual thread lead-in for through-hole and standard blind-hole applications\u003c\/li\u003e\n\u003cli\u003eH2 thread limit ensures consistent 2B and 3B class-of-fit compliance\u003c\/li\u003e\n\u003cli\u003eThree straight flutes maintain rigidity in small-diameter threading\u003c\/li\u003e\n\u003cli\u003eRight-hand thread direction  -  standard for most machine and hand-tapping setups\u003c\/li\u003e\n\u003cli\u003eNo coolant-through requirement  -  compatible with flood coolant or dry cutting depending on material\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned to cut 4-40 UNC threads in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. Suitable for use with standard tap holders and collet chucks sized for a 0.141-inch shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap is installed by a machinist or tool-and-die technician in a compatible tap holder, collet, or tapping head. Ensure the machine spindle is at a safe stop and all motion is arrested before changing tooling. Use appropriate cutting fluid or coolant for the workpiece material to maximize tool life and thread quality. Do not reverse the tap without confirming the setup is configured for reversible tapping to avoid breakage in the hole.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40\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: 40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\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: 2B and 3B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.5625 inches (9\/16 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.141 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 0.6811 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.11 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.1875 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\u003c\/strong\u003e: TiCN\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: 102\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: 1012208\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51740875292978,"sku":"1012208","price":25.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/326d7ab8b02d8071a42bd324ef4f1ff7_356c40ad-00d4-4c96-b297-48a1a291942b.jpg?v=1788828057","url":"https:\/\/voomisupply.com\/products\/osg-1012208-straight-flute-tap-4-40-unc-ticn-hss","provider":"Voomi Supply","version":"1.0","type":"link"}