{"product_id":"heli-coil-1185-04cn168s-free-running-insert-4-40-stainless","title":"Heli-coil 1185-04CN168S Free Running Insert 4-40 Stainless","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HELI-COIL 1185-04CN168S is a tanged, free-running wire thread insert designed to create durable, wear-resistant internal threads in tapped holes. Built from 304 stainless steel, this coiled insert installs into a pre-tapped Heli-Coil STI thread and provides a standard 4-40 UNC mating thread once seated. The tanged design allows installation with a standard tang-break tool. At 0.168 inches overall length with a 1-1\/2D length-to-diameter ratio and 4-3\/4 free coils, this insert restores or reinforces thread integrity in stripped, soft, or high-cycle fastening applications. Licensed trades and precision fabricators rely on these inserts for machine screws in aluminum, cast iron, and other base materials where thread stripping is a concern.\u003c\/p\u003e\n\u003cp\u003eFree-running inserts of this type are used across mechanical, electrical, HVAC, and industrial assembly applications wherever a 4-40 UNC threaded connection requires reinforcement or repair. The 1185-04CN168S is appropriate for both OEM production environments and field repair scenarios. This package contains 1000 inserts, making it well-suited for production-volume use. Applications include control panels, equipment housings, small motor assemblies, and any assembly where a lightweight base material must carry a machine screw thread reliably.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e4-40 UNC thread size, compatible with standard 4-40 machine screws\u003c\/li\u003e\n  \u003cli\u003e304 stainless steel construction for corrosion resistance and hardness\u003c\/li\u003e\n  \u003cli\u003eTanged design for positive engagement during installation with a tang-break tool\u003c\/li\u003e\n  \u003cli\u003e0.168 inches overall length at a 1-1\/2D length-to-diameter ratio\u003c\/li\u003e\n  \u003cli\u003e4-3\/4 free coils for consistent thread engagement across the full insert length\u003c\/li\u003e\n  \u003cli\u003eBulk pack of 1000 inserts for production or high-volume service use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in Heli-Coil STI pre-tapped holes sized for a 4-40 UNC free-running insert with a 1-1\/2D length-to-diameter ratio. Requires the appropriate Heli-Coil STI tap and installation tool for proper fitment.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation requires a correctly sized Heli-Coil STI tap to prepare the receiving hole prior to insert placement. Use the matching Heli-Coil installation tool to drive the insert to the correct depth without over-torquing. After installation, break the driving tang using a tang-break tool or punch; remove tang fragments from blind holes before assembly. Follow the fastener and equipment manufacturer guidelines for pre-tap drill sizing and insert depth requirements.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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\u003eOverall Insert Length\u003c\/strong\u003e: 0.168 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: 4-3\/4\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\u003ePackage Quantity\u003c\/strong\u003e: 1000 inserts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23291804\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: 1185-04CN168S\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":51985648976178,"sku":"1185-04CN168S","price":1015.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/af5af2070f66a4ee8076b67ccf2ac1a6.jpg?v=1789985627","url":"https:\/\/voomisupply.com\/products\/heli-coil-1185-04cn168s-free-running-insert-4-40-stainless","provider":"Voomi Supply","version":"1.0","type":"link"}