{"product_id":"heli-coil-a3585-04en224-screw-locking-insert-4-40-unc","title":"Heli-coil A3585-04EN224 Screw-locking Insert 4-40 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HELI-COIL A3585-04EN224 is a tangless screw-locking helical coil insert designed to create a durable, vibration-resistant threaded hole in softer base materials. Built from 18-8 stainless steel, it accepts a 4-40 UNC fastener and provides a 2D length-to-diameter ratio with an overall length of 0.224 inches. The tangless design eliminates the need for tang break-off during installation, reducing debris and simplifying the process. With a maximum locking torque of 48 oz-in and a minimum breakaway torque of 10 oz-in, this insert delivers reliable thread locking without adhesives. It is installed by licensed technicians and maintenance professionals across aerospace, HVAC, electrical, and general mechanical applications.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for light-duty threaded repair and new-installation applications where a 4-40 UNC thread form is required in aluminum, magnesium, plastic, or other materials with lower shear strength than the fastener. The 2D configuration provides a compact, space-saving thread engagement in confined areas. The stainless steel construction resists corrosion in environments where moisture or chemical exposure is a concern. Each package contains one insert.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eTangless design eliminates tang break-off debris during and after installation\u003c\/li\u003e\n  \u003cli\u003e18-8 stainless steel construction for corrosion resistance\u003c\/li\u003e\n  \u003cli\u003e4-40 UNC thread size with 2D length-to-diameter ratio\u003c\/li\u003e\n  \u003cli\u003eMaximum locking torque of 48 oz-in provides secure vibration-resistant thread locking\u003c\/li\u003e\n  \u003cli\u003eMinimum breakaway torque of 10 oz-in for controlled removal when needed\u003c\/li\u003e\n  \u003cli\u003eCompact 0.224-inch overall length fits tight installation spaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style threaded insert for applications requiring a 4-40 UNC internal thread in materials with insufficient shear strength for direct tapping.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation requires a properly sized HELI-COIL tap and a compatible tangless insert installation tool. Always power down or de-energize any equipment before drilling and tapping operations. The host material bore must be tapped to the correct insert-thread specification before the insert is driven in. Follow applicable mechanical and electrical codes when repairing threaded holes in service equipment.\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\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: 18-8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTang\u003c\/strong\u003e: Tangless\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Inserts\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: A3585-04EN224\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":52070991200562,"sku":"A3585-04EN224","price":21.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4f1e4efb340d5ad2bf78af87aad41343.jpg?v=1790048814","url":"https:\/\/voomisupply.com\/products\/heli-coil-a3585-04en224-screw-locking-insert-4-40-unc","provider":"Voomi Supply","version":"1.0","type":"link"}