{"product_id":"heli-coil-a1185-02cn258-2-56-unc-free-running-insert","title":"Heli-coil A1185-02CN258 2-56 Unc Free Running Insert","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HELI-COIL A1185-02CN258 is a free running helical wire threaded insert designed to create or restore strong, wear-resistant threads in soft or damaged base materials. The insert is sized for a 2-56 UNC thread and measures 0.258 inches overall length, giving it a 3D length-to-diameter ratio suited for shallow-boss applications. Manufactured from 304 stainless steel with a bright, uncoated finish, it resists corrosion and handles repeated assembly cycles without galling. Machinists, maintenance technicians, and assembly professionals install this insert type when a parent material cannot hold a standard thread reliably on its own.\u003c\/p\u003e\n\u003cp\u003eThis insert is used in production assembly and repair scenarios where a 2-56 UNC internal thread is required in aluminum, magnesium, plastic, cast iron, or other materials with lower thread-holding strength than the fastener demands. The tanged design is compatible with standard HELI-COIL tangbreak installation tools and drive mandrels. With 11-7\/8 free coils, the insert distributes fastener load evenly across the full installed length. Typical applications include instrument housings, electronic enclosures, small engine components, and precision mechanical assemblies.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e2-56 UNC thread size for fine-pitch small-fastener applications\u003c\/li\u003e\n  \u003cli\u003e0.258 inch overall length with a 3D length-to-diameter ratio\u003c\/li\u003e\n  \u003cli\u003e304 stainless steel construction for corrosion resistance and durability\u003c\/li\u003e\n  \u003cli\u003eTanged design for use with standard HELI-COIL installation tooling\u003c\/li\u003e\n  \u003cli\u003e11-7\/8 free coils distribute clamping load along the full insert length\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish maintains dimensional consistency without coating buildup\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style free running insert for use in any application requiring a 2-56 UNC internal thread repair or reinforcement in a pre-drilled and tapped HELI-COIL insert bore.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation requires a properly sized HELI-COIL tap to prepare the parent material bore before the insert is driven in. A matched mandrel or drive tool threads the insert into the prepared bore until the top coil sits one-half turn below the surface. After installation, the tang is broken off using a tang breakoff tool. Power down or de-energize any assembly before performing thread repair work in an energized system, and follow applicable shop safety and torque procedures for the fastener and base material involved.\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\u003eOverall Insert Length\u003c\/strong\u003e: 0.258 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength to Diameter Ratio\u003c\/strong\u003e: 3D\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Free Coils\u003c\/strong\u003e: 11-7\/8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTang\u003c\/strong\u003e: Tanged\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: 304\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Inserts\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.002 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: HELI-COIL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: A1185-02CN258\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":51971237839154,"sku":"A1185-02CN258","price":25.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/876fe8430aaa8bb44855fa3e9d02782a.jpg?v=1789954981","url":"https:\/\/voomisupply.com\/products\/heli-coil-a1185-02cn258-2-56-unc-free-running-insert","provider":"Voomi Supply","version":"1.0","type":"link"}