{"product_id":"osg-1305710208-spiral-flute-tap-4-40-unc-ticn-coated","title":"Osg 1305710208 Spiral Flute Tap 4-40 Unc Ticn Coated","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1305710208 is a spiral flute tap designed for cutting 4-40 UNC internal threads in challenging materials. It features a modified bottoming chamfer, three right-hand flutes with a 10-degree helix angle, and a TICN (titanium carbonitride) coating over a powdered metal substrate. The spiral flute geometry evacuates chips up and out of the hole, making it well suited for blind-hole tapping applications. With an overall length of 1.875 inches and an H2 thread limit, it holds tight tolerances for 2B and 3B class-of-fit requirements. Licensed machinists, tool-and-die makers, and CNC operators are the primary users of this tap.\u003c\/p\u003e\u003cp\u003eThis tap is built for use in materials that demand both coating hardness and substrate toughness. Rated material applications include alloy steel, stainless steel, hardened steel, titanium, and high-nickel alloys. Its compact 4-40 UNC thread size makes it common in precision assemblies, instrument hardware, and small-component manufacturing where fine threads and close tolerances are critical. It is equally at home in manual tapping fixtures and CNC machining centers equipped for rigid or semi-rigid tapping cycles.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSpiral flute design evacuates chips upward, reducing packing in blind holes\u003c\/li\u003e\n\u003cli\u003eTICN coating increases surface hardness and lubricity for extended tool life in abrasive and hard materials\u003c\/li\u003e\n\u003cli\u003ePowdered metal construction provides a uniform, fine-grain substrate with high wear resistance\u003c\/li\u003e\n\u003cli\u003eModified bottoming chamfer allows threading close to the bottom of a blind hole\u003c\/li\u003e\n\u003cli\u003eH2 thread limit holds consistent 2B and 3B class-of-fit tolerances\u003c\/li\u003e\n\u003cli\u003eRight-hand thread and right-hand flute direction — compatible with standard spindle rotation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for cutting 4-40 UNC threads in alloy steel, stainless steel, hardened steel, titanium, and high-nickel alloys. Part of the OSG Series 313TI tap line.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eTapping operations should be performed by a qualified machinist following established speeds and feeds for the workpiece material and tap size. Ensure the workpiece is securely fixtured and the tap is properly aligned to the pilot hole before engagement. Always use an appropriate tapping fluid or cutting oil for the material being threaded. Inspect the tap for wear or chipping before each use; a damaged tap can cause thread failure or tap 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\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Modified Bottoming\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B \/ 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\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Style\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 10 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Powdered Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TICN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.875 inches (56 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.559 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.141 inches (3.5814 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.1875 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\u003eThreads per Inch\u003c\/strong\u003e: 40\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: Alloy Steel, Stainless Steel, Hardened Steel, Titanium, High-Nickel Alloy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 313TI\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: 1305710208\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51732744864050,"sku":"1305710208","price":76.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a07c1382263f33040791cef9c058e49e.jpg?v=1788746236","url":"https:\/\/voomisupply.com\/products\/osg-1305710208-spiral-flute-tap-4-40-unc-ticn-coated","provider":"Voomi Supply","version":"1.0","type":"link"}