{"product_id":"heli-coil-a3585-02cnpf129-screw-locking-insert-2-56-unc","title":"Heli-coil A3585-02CNPF129 Screw-locking Insert 2-56 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HELI-COIL A3585-02CNPF129 is a tangless, screw-locking helical wire insert designed to create strong, repairable internal threads in parent materials where 2-56 UNC threads are required. Manufactured from Grade 304 stainless steel with a primer-free finish, this insert measures 0.129 inches in overall length at a 1-1\/2D length-to-diameter ratio. The tangless design eliminates the need for tang break-off after installation, reducing debris risk in assemblies where foreign object damage is a concern. Installed by aerospace, defense, and precision manufacturing technicians, this insert locks against vibrational loosening with a maximum locking torque of 20 oz-in and a minimum breakaway torque of 3.00 oz-in.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for use in fine-pitch threaded assemblies where vibration resistance and thread repair are priorities. The 2-56 UNC thread size targets small-fastener applications common in electronics enclosures, instrument panels, and precision mechanical assemblies. The 5-1\/4 free coil count and locking feature make it appropriate for applications subject to dynamic loads or repeated fastener cycling. Installation is performed using HELI-COIL compatible tangless installation tooling matched to the 2-56 thread size.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eTangless design eliminates tang break-off step and prevents debris contamination in the assembly\u003c\/li\u003e\n  \u003cli\u003eScrew-locking construction resists vibrational loosening up to 20 oz-in locking torque\u003c\/li\u003e\n  \u003cli\u003eGrade 304 stainless steel construction provides corrosion resistance in demanding environments\u003c\/li\u003e\n  \u003cli\u003ePrimer-free finish suitable for direct installation without additional surface prep\u003c\/li\u003e\n  \u003cli\u003e0.129 inch overall length at 1-1\/2D ratio fits standard insert pocket depths for 2-56 applications\u003c\/li\u003e\n  \u003cli\u003e5-1\/4 free coils deliver consistent locking engagement across the thread engagement length\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style screw-locking thread insert for parent material bores prepared to accept 2-56 UNC helical wire inserts using compatible tangless installation tooling.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation requires a tangless HELI-COIL installation tool sized for 2-56 UNC thread inserts  -  do not attempt installation with standard tang-type drivers. The parent bore must be drilled and tapped to the correct HELI-COIL tap drill size for 2-56 UNC before insert installation. Ensure the assembly is depowered and secured before performing thread repair or insert installation in electromechanical assemblies. Minimum breakaway torque of 3.00 oz-in must be verified per applicable inspection requirements after installation.\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\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\u003eNumber of Free Coils\u003c\/strong\u003e: 5-1\/4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTang\u003c\/strong\u003e: Tangless\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: Primer Free\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: A3585-02CNPF129\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":52023881171250,"sku":"A3585-02CNPF129","price":26.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5f1fd9ddf4f69f9c012c18b8439a55c6.jpg?v=1790014360","url":"https:\/\/voomisupply.com\/products\/heli-coil-a3585-02cnpf129-screw-locking-insert-2-56-unc","provider":"Voomi Supply","version":"1.0","type":"link"}