{"product_id":"heli-coil-a1185-4en375-free-running-insert-1-4-20-unc","title":"Heli-coil A1185-4EN375 Free Running Insert 1\/4-20 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HELI-COIL A1185-4EN375 is a free running helical wire thread insert designed to restore or reinforce threaded holes in metal components. It installs into a pre-drilled and tapped host material, creating a durable internal thread that accepts standard 1\/4-20 UNC fasteners. Constructed from 18-8 stainless steel, it offers corrosion resistance suitable for demanding service environments. The insert measures 0.375 inches overall length, which corresponds to a 1-1\/2D length-to-diameter ratio. A tanged design aids installation using a standard HELI-COIL insertion tool. Typically installed by machinists, maintenance technicians, or field service professionals during thread repair or new-part fabrication work.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for applications requiring reliable thread repair or thread reinforcement in aluminum, cast iron, steel, or other base materials. The 1\/4-20 UNC thread is a common fastener size across HVAC equipment panels, electrical enclosures, pump housings, and general mechanical assemblies. The 5-3\/4 free coils provide consistent thread engagement across the full insert length. MOQ is 10 units; each package contains 1 insert.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-20 UNC thread size for compatibility with standard inch-series fasteners\u003c\/li\u003e\n  \u003cli\u003e0.375 inches overall length with 1-1\/2D length-to-diameter ratio\u003c\/li\u003e\n  \u003cli\u003e18-8 stainless steel construction for corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eTanged design for use with standard HELI-COIL insertion tooling\u003c\/li\u003e\n  \u003cli\u003e5-3\/4 free coils for full thread engagement across insert length\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard free running helical thread insert for 1\/4-20 UNC tapped holes in metallic base materials requiring thread repair or reinforcement.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation requires a properly sized HELI-COIL tap and a compatible insertion tool; refer to the manufacturer tool chart for the correct tap drill size for 1\/4-20 UNC inserts. Power down any equipment and remove the component from service before performing thread repair. After driving the insert to the correct depth, break off the installation tang using a tang break-off tool or needle-nose pliers. Follow applicable shop safety procedures when working with cutting tools and metal chips.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20\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: 0.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength to Diameter Ratio\u003c\/strong\u003e: 1-1\/2D\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Free Coils\u003c\/strong\u003e: 5-3\/4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTang Type\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: 18-8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Inserts per Package\u003c\/strong\u003e: 1\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: A1185-4EN375\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":51971270377778,"sku":"A1185-4EN375","price":36.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1217479471916750b454600b88be5dba.jpg?v=1789955256","url":"https:\/\/voomisupply.com\/products\/heli-coil-a1185-4en375-free-running-insert-1-4-20-unc","provider":"Voomi Supply","version":"1.0","type":"link"}