{"product_id":"heli-coil-a3585-02cn129-2-56-unc-locking-insert-304-ss","title":"Heli-coil A3585-02CN129 2-56 Unc Locking Insert 304 Ss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HELI-COIL A3585-02CN129 is a tangless screw-locking helical coil insert designed to create durable, vibration-resistant threaded connections in parent materials. Built from Grade 304 stainless steel with a bright finish, it accepts a 2-56 UNC fastener and measures 0.129 inches in overall length at a 1-1\/2D length-to-diameter ratio. The locking function is produced by a deformed coil that applies radial pressure against the mating bolt thread, resisting loosening under vibration and dynamic load. Machinists, assembly technicians, and MRO professionals install these inserts to repair damaged threads or reinforce thin-wall parent material in precision assemblies.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for applications requiring a small-diameter, fine-pitch threaded connection with positive locking performance. The tangless design eliminates the need for tang break-off after installation, reducing debris risk inside blind holes and simplifying automated or hand installation with the appropriate installation tool. Typical applications include aerospace subassemblies, electronic enclosures, instrumentation housings, and other precision components where thread integrity and vibration resistance are critical.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eTangless design eliminates post-installation tang removal, reducing contamination risk in blind holes\u003c\/li\u003e\n  \u003cli\u003eGrade 304 stainless steel construction provides corrosion resistance in demanding service environments\u003c\/li\u003e\n  \u003cli\u003eMaximum locking torque of 20 oz-in with a minimum breakaway torque of 3.00 oz-in for reliable retention\u003c\/li\u003e\n  \u003cli\u003e5-1\/4 free coils with an outside diameter range of 0.110 to 0.119 inches for consistent fit in the installed bore\u003c\/li\u003e\n  \u003cli\u003eBright finish for easy inspection and clean appearance in finished assemblies\u003c\/li\u003e\n  \u003cli\u003e2-56 UNC thread standard compatible with standard 2-56 fasteners\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style threaded repair and reinforcement insert for 2-56 UNC threaded holes in metal or composite parent materials requiring a screw-locking helical coil solution.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation requires a correctly sized tang-free installation tool matched to the 2-56 UNC thread size. The parent material must be drilled and tapped with the appropriate HELI-COIL tap to achieve the correct minor diameter before insert installation. Ensure the workpiece is secured and free of chips or debris before driving the insert to the specified depth. Always follow the assembly drawing or engineering specification for insert flush depth and torque requirements on the final fastener.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 2-56 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: 0.129 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\u003eMinimum Outside Diameter\u003c\/strong\u003e: 0.110 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Outside Diameter\u003c\/strong\u003e: 0.119 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Free Coils\u003c\/strong\u003e: 5-1\/4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Locking Torque\u003c\/strong\u003e: 20 oz-in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Breakaway Torque\u003c\/strong\u003e: 3.00 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\u003eCoating\/Finish\u003c\/strong\u003e: Bright\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  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0002 pounds\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: A3585-02CN129\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":51971961520434,"sku":"A3585-02CN129","price":23.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/87196cbe18be17c0ef7f445009056401.jpg?v=1789959624","url":"https:\/\/voomisupply.com\/products\/heli-coil-a3585-02cn129-2-56-unc-locking-insert-304-ss","provider":"Voomi Supply","version":"1.0","type":"link"}