{"product_id":"heli-coil-t3585-04c224s-4-40-unc-2d-locking-insert-ss304","title":"Heli-coil T3585-04C224S 4-40 Unc 2D Locking Insert SS304","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HELI-COIL T3585-04C224S is a screw-locking helical wire thread insert designed to create a secure, vibration-resistant internal thread in tapped holes. Manufactured from Grade 304 stainless steel, this tanged insert installs into a pre-tapped Heli-Coil STI hole to deliver a 4-40 UNC female thread with a 2D length-to-diameter ratio and an overall length of 0.224 inches. The locking feature is built into a series of non-circular coils that grip the mating fastener and resist self-loosening under dynamic loads. Machinists, MRO technicians, and assembly professionals use this insert in precision thread repair and original equipment assembly work.\u003c\/p\u003e\u003cp\u003eThis insert is suited for applications where thread integrity and vibration resistance are critical, including aerospace assemblies, electronics enclosures, instrumentation, and light mechanical assemblies. The Grade 304 stainless steel construction resists corrosion in moderate environments. The 2D configuration keeps the installed profile compact while delivering reliable locking performance. This listing includes 1000 inserts per package, making it appropriate for production-run or bench-stock use rather than single-repair service calls.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eScrew-locking design resists vibration-induced loosening without adhesives or thread-locking compounds\u003c\/li\u003e\n\u003cli\u003eGrade 304 stainless steel construction provides corrosion resistance in moderate-duty environments\u003c\/li\u003e\n\u003cli\u003e4-40 UNC thread standard for small-fastener applications in precision assemblies\u003c\/li\u003e\n\u003cli\u003eOverall length of 0.224 inches with a 2D length-to-diameter ratio for compact installation depth\u003c\/li\u003e\n\u003cli\u003eMaximum locking torque of 48 oz-in with a minimum breakaway torque of 10 oz-in\u003c\/li\u003e\n\u003cli\u003eTanged installation style for use with standard Heli-Coil tang break-off tools\u003c\/li\u003e\n\u003cli\u003ePack of 1000 inserts supports production-volume or high-turnover bench stock\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for installation into STI-tapped holes prepared for 4-40 UNC Heli-Coil style inserts. Requires the appropriate Heli-Coil STI tap and installation tool for the 4-40 thread size.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires a properly prepared STI-tapped hole sized to the insert manufacturer's specification for 4-40 UNC. Use the correct Heli-Coil installation mandrel to wind the insert into the hole without distorting the coils. After installation, break off the tang using an approved tang break-off tool. Always de-energize and lock out any equipment before performing thread repair or insert installation on in-service components.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength to Diameter Ratio\u003c\/strong\u003e: 2D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Insert Length\u003c\/strong\u003e: 0.224 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Outside Diameter\u003c\/strong\u003e: 0.144 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Outside Diameter\u003c\/strong\u003e: 0.159 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Free Coils\u003c\/strong\u003e: 6-3\/4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Locking Torque\u003c\/strong\u003e: 48 oz-in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Breakaway Torque\u003c\/strong\u003e: 10 oz-in\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\u003eTang Style\u003c\/strong\u003e: Tanged\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: 1 pound\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: T3585-04C224S\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":51971928949042,"sku":"T3585-04C224S","price":1045.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d8275725bb674aff6c52e1a5d714ad78_43721130-fb90-4006-ba68-4dd949e2a284.jpg?v=1789959139","url":"https:\/\/voomisupply.com\/products\/heli-coil-t3585-04c224s-4-40-unc-2d-locking-insert-ss304","provider":"Voomi Supply","version":"1.0","type":"link"}