{"product_id":"heli-coil-a3585-02cnw129-2-56-unc-locking-insert","title":"Heli-coil A3585-02CNW129 2-56 Unc Locking Insert","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HELI-COIL A3585-02CNW129 is a tangless screw-locking threaded insert designed to create a durable, vibration-resistant female thread in a tapped hole. Manufactured from Grade 304 stainless steel with a dry film lubricant finish, this insert measures 0.129 inches overall length and is sized for 2-56 UNC thread applications. The locking feature is achieved through a deformed coil section that grips the mating fastener, resisting loosening under dynamic loads. Installation does not require a tang break-off step, which reduces debris risk and simplifies the process in blind-hole applications. This insert is used by assembly technicians, aerospace fabricators, and precision equipment maintenance professionals.\u003c\/p\u003e\u003cp\u003eThis insert is suited for applications where a 2-56 UNC thread must be installed or restored in soft or damaged base materials including aluminum, magnesium, and plastic substrates. The 1-1\/2D length-to-diameter ratio provides a solid thread engagement zone appropriate for fastener loads common in light mechanical and electronic assemblies. The tangless design makes it well-suited for cleanroom and close-tolerance environments where tang fragments cannot be tolerated.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTangless design eliminates tang removal and reduces debris in blind-hole installations\u003c\/li\u003e\n\u003cli\u003eGrade 304 stainless steel construction resists corrosion in harsh or washdown environments\u003c\/li\u003e\n\u003cli\u003eDry film lubricant finish reduces installation torque and galling during drive-in\u003c\/li\u003e\n\u003cli\u003eMaximum locking torque of 20 oz-in with a minimum breakaway torque of 3.00 oz-in for reliable fastener retention\u003c\/li\u003e\n\u003cli\u003e5-1\/4 free coils with outside diameter range of 0.110 to 0.119 inches for consistent hole fit\u003c\/li\u003e\n\u003cli\u003e1-1\/2D length-to-diameter ratio provides full thread engagement in thin-wall and shallow-boss applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a replacement or new-installation locking insert for 2-56 UNC tapped holes in applications requiring a stainless steel, tangless, dry-film-lubricated insert with a 1-1\/2D engagement length.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires a correctly sized 2-56 UNC STI (Screw Thread Insert) tap to prepare the host hole to the proper oversize diameter before insert drive-in. Use the appropriate HELI-COIL tangless installation tool to drive and seat the insert without damaging the coil. Verify hole depth and thread engagement length before installation. Always follow the equipment manufacturer's torque specifications for the mating fastener after insert installation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: Dry Film Lubricant\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTang\u003c\/strong\u003e: Tangless\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.04 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Inserts\u003c\/strong\u003e: 1\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: A3585-02CNW129\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":51972009591090,"sku":"A3585-02CNW129","price":24.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/24f4756e779f1c365e5524bd214cb027.jpg?v=1789960826","url":"https:\/\/voomisupply.com\/products\/heli-coil-a3585-02cnw129-2-56-unc-locking-insert","provider":"Voomi Supply","version":"1.0","type":"link"}