{"product_id":"e-z-lok-335-4-thread-locking-insert-1-4-20-unc-carbon-steel","title":"E-z Lok 335-4 Thread Locking Insert 1\/4-20 Unc Carbon Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe E-Z LOK 335-4 is a self-locking threaded insert designed to create a secure, vibration-resistant internal thread in drilled or tapped holes. It features a 1\/4-20 internal thread and a 1\/2-13 external thread, both cut to UNC standard. The insert is machined from C12L14 carbon steel with a smooth, rolled finish, delivering a tensile strength of 5,285 pounds. At 31\/64 inches overall length, it installs into standard tapped holes using a conventional tap. Licensed HVAC techs, millwrights, maintenance mechanics, and plumbers use this type of insert to repair stripped threads or to anchor fasteners in softer base materials.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for light industrial, mechanical, and trade service applications where a permanent, load-bearing internal thread is needed. The self-lock wall design creates interference between the insert and the parent material, eliminating thread movement under dynamic or vibrational loads. Typical installations include sheet metal frames, cast housings, equipment panels, and structural assemblies where standard tapped holes are insufficient or have been damaged. A standard 1\/2-13 tap prepares the host material for installation.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-20 internal thread and 1\/2-13 external thread, both UNC standard\u003c\/li\u003e\n  \u003cli\u003eSelf-lock wall design resists loosening under vibration and dynamic load\u003c\/li\u003e\n  \u003cli\u003eC12L14 carbon steel construction with 5,285-pound tensile strength\u003c\/li\u003e\n  \u003cli\u003e31\/64 inches overall length for compact, low-profile installation\u003c\/li\u003e\n  \u003cli\u003eInternal thread class of fit 2B, external thread class of fit 2A\u003c\/li\u003e\n  \u003cli\u003eInstalls with a standard tap  -  no special tooling required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation thread repair insert for applications requiring a 1\/4-20 internal UNC thread in a 1\/2-13 tapped hole across a wide range of mechanical and trade assemblies.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by mechanics, millwrights, or licensed tradespeople with threaded fastener repair experience. The host material must be tapped to 1\/2-13 UNC using a standard tap before the insert is driven in. Power down or de-energize any equipment before beginning thread repair work on live assemblies. Do not exceed the rated tensile load of 5,285 pounds when specifying fasteners for this insert.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInternal Thread Size\u003c\/strong\u003e: 1\/4-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExternal Thread Size\u003c\/strong\u003e: 1\/2-13\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInternal Thread Class of Fit\u003c\/strong\u003e: 2B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExternal Thread Class of Fit\u003c\/strong\u003e: 2A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 31\/64 inches (0.484 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Type\u003c\/strong\u003e: Self-Lock Wall\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTensile Strength\u003c\/strong\u003e: 5,285 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Carbon Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C12L14\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating \/ Finish\u003c\/strong\u003e: Smooth, Rolled\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFor Tap Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0146 pounds\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: E-Z LOK\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 335-4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"E-Z LOK","offers":[{"title":"Default Title","offer_id":67911069466930,"sku":"335-4","price":34.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5430c68701a45b58cf5bd4da20b78cdf.jpg?v=1791203942","url":"https:\/\/voomisupply.com\/products\/e-z-lok-335-4-thread-locking-insert-1-4-20-unc-carbon-steel","provider":"Voomi Supply","version":"1.0","type":"link"}