{"product_id":"heli-coil-a3585-04cn224-screw-locking-insert-4-40-unc","title":"Heli-coil A3585-04CN224 Screw-locking Insert 4-40 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HELI-COIL A3585-04CN224 is a tangless screw-locking wire thread insert designed to create strong, vibration-resistant threaded holes in parent materials that require durable fastener retention. Built from Grade 304 stainless steel with a bright finish, this insert accepts 4-40 UNC fasteners and provides a 2D length-to-diameter ratio with an overall length of 0.224 inches. The locking feature is achieved through a deformed coil that applies radial pressure on the mating screw thread, resisting loosening under dynamic loads. Machinists, assembly technicians, and maintenance professionals install these inserts using a standard installation tool in pre-drilled and tapped holes.\u003c\/p\u003e\u003cp\u003eThis insert is suited for applications where a reliable locking thread is needed in small-diameter fastener locations, including electronic enclosures, instrument panels, precision equipment, and light mechanical assemblies. The tangless design eliminates the need for tang removal after installation, streamlining the assembly process. Its stainless steel construction makes it appropriate for environments where corrosion resistance is a priority.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTangless design  -  no tang removal step required after installation\u003c\/li\u003e\n\u003cli\u003eGrade 304 stainless steel construction with bright finish 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 with a minimum breakaway torque of 10 oz-in\u003c\/li\u003e\n\u003cli\u003e6-3\/4 free coils for consistent thread engagement and locking performance\u003c\/li\u003e\n\u003cli\u003eMinimum outside diameter of 0.144 inches, maximum outside diameter of 0.159 inches\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation thread insert for tapped holes requiring 4-40 UNC internal threads with a 2D insert length.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires a properly tapped parent hole sized for a Heli-Coil 4-40 insert and a compatible tangless installation tool. Power down or de-energize any assembly before performing thread repair or insert installation in electrical or electronic components. Follow applicable assembly standards and torque guidelines for the parent material being used. Do not attempt to install this insert without the correct installation tool, as improper installation can damage the coil or parent material.\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\u003eOverall Insert Length\u003c\/strong\u003e: 0.224 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength to Diameter Ratio\u003c\/strong\u003e: 2D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTang\u003c\/strong\u003e: Tangless\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\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\u003eNumber of Free Coils\u003c\/strong\u003e: 6-3\/4\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\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.003 pounds\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: A3585-04CN224\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":51998743757106,"sku":"A3585-04CN224","price":19.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/afa6f5d4bf6a9f6fdc27d9413016a600.jpg?v=1789995059","url":"https:\/\/voomisupply.com\/products\/heli-coil-a3585-04cn224-screw-locking-insert-4-40-unc","provider":"Voomi Supply","version":"1.0","type":"link"}