{"product_id":"heli-coil-02cpa-hand-sti-tap-2-56-unc-h2-3-flute","title":"Heli-coil 02CPA Hand Sti Tap 2-56 Unc H2 3 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HELI-COIL 02CPA is a hand STI tap designed for cutting internal threads in preparation for Heli-Coil thread insert installation. Built from high-speed steel with a bright uncoated finish, it cuts 2-56 UNC threads to a H2 thread limit with a 3-flute, plug chamfer geometry. The plug chamfer makes it suitable for through-hole tapping applications where the tap enters from the open end of the bore. With an overall length of 1.875 inches and a thread length of 0.5625 inches, this tap is sized for precision work in small fastener applications. Licensed machinists, tool and die technicians, and field service pros use STI taps when restoring stripped or damaged threads.\u003c\/p\u003e\n\u003cp\u003eSTI taps are used specifically with Heli-Coil wire thread insert systems, producing an oversized internal thread that accepts a coiled insert. The finished installed thread returns the bore to standard 2-56 UNC dimensions and class 2B fit. Common applications include aluminum castings, electronics enclosures, instrumentation housings, and other materials where stripped threads require restoration without replacing the parent component. Suitable for light to medium production runs and repair work in both shop and field environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCuts 2-56 UNC threads to H2 thread limit for consistent class 2B fit after insert installation\u003c\/li\u003e\n  \u003cli\u003e3-flute plug chamfer geometry suited for through-hole and open-bore tapping\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction provides durability across a range of workpiece materials\u003c\/li\u003e\n  \u003cli\u003eBright uncoated finish for standard tapping applications without special lubricity requirements\u003c\/li\u003e\n  \u003cli\u003eShank diameter of 0.141 inches fits standard tap wrenches and holders for this size range\u003c\/li\u003e\n  \u003cli\u003eSquare drive length of 0.1875 inches with 0.110-inch square size for positive torque engagement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with Heli-Coil STI thread insert systems requiring a 2-56 UNC tapped hole prepared to H2 thread limit and class 2B fit.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eUse with a calibrated tap wrench sized for the 0.141-inch shank. Apply appropriate cutting fluid for the workpiece material before tapping. Ensure the tap is started square to the bore to avoid cross-threading or tap breakage. Follow the thread insert manufacturer specifications for tap drill diameter before beginning the tapping operation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 2-56\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B\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: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.5625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.875 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\u003eSquare Length\u003c\/strong\u003e: 0.1875 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.110 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\u003eUNSPSC Code\u003c\/strong\u003e: 23241600\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: HELI-COIL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 02CPA\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":51992181702962,"sku":"02CPA","price":40.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f88f4f56a821db8f5df7e212882e7a65.jpg?v=1789990192","url":"https:\/\/voomisupply.com\/products\/heli-coil-02cpa-hand-sti-tap-2-56-unc-h2-3-flute","provider":"Voomi Supply","version":"1.0","type":"link"}