{"product_id":"heli-coil-a3591-3cn380-screw-locking-insert-10-32-unf","title":"Heli-coil A3591-3CN380 Screw-locking Insert 10-32 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HELI-COIL A3591-3CN380 is a tangless screw-locking helical thread insert designed to provide a secure, vibration-resistant threaded connection in tapped holes. Made from Grade 304 stainless steel with a bright finish, this insert accepts a 10-32 UNF fastener and delivers a locking function through a controlled interference fit between the insert coils and the mating screw. With an overall length of 0.38 inches and a 2D length-to-diameter ratio, it is suited for applications where thread stripping, corrosion, and loosening under load are primary concerns. Licensed mechanics, maintenance technicians, and assembly professionals install these inserts using standard HELI-COIL installation tooling.\u003c\/p\u003e\u003cp\u003eThis insert is used in applications requiring a durable, corrosion-resistant threaded repair or original-equipment thread reinforcement in metal or composite base materials. The 10-32 UNF thread size makes it common in light mechanical assemblies, instrumentation, and equipment housings where fine-thread fasteners are specified. The tangless design eliminates the need to remove a tang after installation, simplifying the installation process and reducing the risk of loose tang fragments contaminating assemblies. It is appropriate for both production and field repair scenarios where 304 stainless steel is compatible with the operating environment.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eGrade 304 stainless steel construction resists corrosion in wet or chemically active environments\u003c\/li\u003e\n\u003cli\u003eTangless design requires no tang removal after installation, reducing contamination risk\u003c\/li\u003e\n\u003cli\u003e10-32 UNF thread form with 9-1\/2 free coils provides consistent thread engagement\u003c\/li\u003e\n\u003cli\u003eMaximum locking torque of 13 inch-pounds with a minimum breakaway torque of 2.00 ounce-inches\u003c\/li\u003e\n\u003cli\u003eOverall length of 0.38 inches with a 2D length-to-diameter ratio for compact thread reinforcement\u003c\/li\u003e\n\u003cli\u003eBright finish with outside diameter ranging from 0.236 to 0.256 inches for precise hole fit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style or repair-grade thread insert for tapped holes requiring 10-32 UNF threading in metal, plastic, or composite base materials.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires a HELI-COIL tap and installation tool matched to the 10-32 UNF thread size and 2D insert length. The base material must be tapped to the correct HELI-COIL oversize specification before insert installation. De-energize and lock out any equipment before performing thread repair on powered assemblies. Follow the insert manufacturer's tooling instructions to seat the insert flush with or slightly below the surface of the base material.\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: 0.38 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\u003eNumber of Free Coils\u003c\/strong\u003e: 9-1\/2\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\u003eMaximum Locking Torque\u003c\/strong\u003e: 13 inch-pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Breakaway Torque\u003c\/strong\u003e: 2.00 ounce-inches\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\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: A3591-3CN380\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":52069055955250,"sku":"A3591-3CN380","price":24.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ab6b0facbed34acedc0e950e85f1112f.jpg?v=1790047478","url":"https:\/\/voomisupply.com\/products\/heli-coil-a3591-3cn380-screw-locking-insert-10-32-unf","provider":"Voomi Supply","version":"1.0","type":"link"}