{"product_id":"heli-coil-3591-3cn285s-screw-locking-insert-10-32-unf","title":"Heli-coil 3591-3CN285S Screw-locking Insert 10-32 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HELI-COIL 3591-3CN285S is a screw-locking helical coil insert designed to create a secure, vibration-resistant internal thread in a parent material. The insert uses a tanged installation style and holds a 10-32 UNF thread standard. Manufactured from Grade 304 stainless steel, it delivers corrosion resistance suitable for demanding service environments. The overall length is 0.285 inches at a 1-1\/2D length-to-diameter ratio. Maximum locking torque is 13 inch-pounds, with a minimum breakaway torque of 2 inch-ounces. This type of insert is installed by licensed mechanics, maintenance technicians, and precision assembly trades working in metal fabrication, HVAC equipment repair, and industrial equipment service.\u003c\/p\u003e\u003cp\u003eThis insert is suited for applications where a stripped, worn, or undersized 10-32 UNF threaded hole must be restored or reinforced in aluminum, cast iron, magnesium, or other base materials. The locking feature resists loosening under vibration and thermal cycling, making it appropriate for equipment panels, compressor housings, motor mounts, and similar high-cycle assemblies. It is typically installed using a dedicated HELI-COIL installation tool matched to the 10-32 thread size.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e10-32 UNF internal thread for precision fastener engagement\u003c\/li\u003e\n\u003cli\u003eGrade 304 stainless steel construction for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eTanged design for controlled installation depth\u003c\/li\u003e\n\u003cli\u003e1-1\/2D length-to-diameter ratio at 0.285 inches overall length\u003c\/li\u003e\n\u003cli\u003eMaximum locking torque of 13 inch-pounds resists vibration-induced loosening\u003c\/li\u003e\n\u003cli\u003eOutside diameter range of 0.236 to 0.256 inches for consistent fit in tapped holes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation insert for parent materials tapped to accept a 10-32 UNF helical coil insert with a 1-1\/2D engagement length.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires a properly tapped hole sized for the insert outside diameter range and a compatible HELI-COIL insertion tool. Power down and de-energize any equipment before threading or reworking fastener holes in electrical or mechanical assemblies. After installation, break off the drive tang using a tang break-off tool; confirm tang removal before reassembly. Follow the fastener torque specifications of the host equipment manufacturer, not the insert locking torque value alone.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 10-32 UNF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Insert Length\u003c\/strong\u003e: 0.285 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: 0.236 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Outside Diameter\u003c\/strong\u003e: 0.256 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Free Coils\u003c\/strong\u003e: 6-7\/8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Locking Torque\u003c\/strong\u003e: 13 inch-pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Breakaway Torque\u003c\/strong\u003e: 2 inch-ounces\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\u003eTang\u003c\/strong\u003e: Tanged\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.48 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: 3591-3CN285S\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":52040912961842,"sku":"3591-3CN285S","price":1386.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d12462f9c419d20a54ec52e64fbbb086.jpg?v=1790027359","url":"https:\/\/voomisupply.com\/products\/heli-coil-3591-3cn285s-screw-locking-insert-10-32-unf","provider":"Voomi Supply","version":"1.0","type":"link"}