{"product_id":"heli-coil-t3585-04c168s-4-40-unc-locking-insert-ss-1000pk","title":"Heli-coil T3585-04C168S 4-40 Unc Locking Insert Ss 1000pk","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HELI-COIL T3585-04C168S is a screw-locking helical coil insert designed to create a strong, vibration-resistant threaded connection in tapped holes. Built from Grade 304 stainless steel, this tanged insert installs into a standard Heli-Coil tapped hole and provides a 4-40 UNC internal thread at a 1-1\/2D length. The overall insert length measures 0.168 inches. The locking feature is achieved through a deflected coil that applies radial pressure against the fastener, resisting loosening under vibration and dynamic loading. This insert is suited for use in metalworking, aerospace, electronics, and general industrial assembly applications.\u003c\/p\u003e\u003cp\u003eThis insert is used wherever a durable, corrosion-resistant threaded repair or thread reinforcement is needed in a 4-40 UNC tapped hole. The Grade 304 stainless steel construction makes it appropriate for applications exposed to moisture or mild corrosive environments. Typical installation scenarios include electronics enclosures, instrumentation panels, light-gauge metal assemblies, and precision mechanical components where thread stripping or vibration loosening is a concern. This product ships in a package quantity of 1000 inserts, making it suitable for production-level use.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eGrade 304 stainless steel construction for corrosion resistance\u003c\/li\u003e\n\u003cli\u003e4-40 UNC thread size with 1-1\/2D length-to-diameter ratio\u003c\/li\u003e\n\u003cli\u003eOverall insert length of 0.168 inches\u003c\/li\u003e\n\u003cli\u003eTanged design for standard Heli-Coil installation tooling\u003c\/li\u003e\n\u003cli\u003eMaximum locking torque of 48 oz-in; minimum breakaway torque of 10 oz-in\u003c\/li\u003e\n\u003cli\u003e4-3\/4 free coils for consistent thread engagement\u003c\/li\u003e\n\u003cli\u003eOutside diameter range of 0.144 to 0.159 inches for precise hole fit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in standard Heli-Coil prepared tapped holes with 4-40 UNC thread specification. Compatible with the corresponding Heli-Coil tang break-off tool and installation driver for tanged inserts.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires a Heli-Coil tap to prepare the receiving hole to the correct oversize diameter before insert installation. Use the appropriate Heli-Coil installation tool matched to the 4-40 insert size. After seating the insert flush or slightly below the surface, break off the installation tang using the designated tang break-off tool. Always verify thread engagement depth and torque requirements against the assembly specification before finalizing installation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40 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: 0.168 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: 0.144 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Outside Diameter\u003c\/strong\u003e: 0.159 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Free Coils\u003c\/strong\u003e: 4-3\/4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTang\u003c\/strong\u003e: Tanged\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Locking Torque\u003c\/strong\u003e: 48 oz-in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Breakaway Torque\u003c\/strong\u003e: 10 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\u003ePackage Quantity\u003c\/strong\u003e: 1000 inserts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\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: T3585-04C168S\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":52060095250738,"sku":"T3585-04C168S","price":639.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/fe52e24f5a26a68a0cf32bc717350eab.jpg?v=1790040831","url":"https:\/\/voomisupply.com\/products\/heli-coil-t3585-04c168s-4-40-unc-locking-insert-ss-1000pk","provider":"Voomi Supply","version":"1.0","type":"link"}