{"product_id":"e-z-lok-329-720-thread-locking-insert-7-16-20-5-8-11-unf","title":"E-z Lok 329-720 Thread Locking Insert 7\/16-20 5\/8-11 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe E-Z LOK 329-720 is a self-locking threaded insert designed to create a secure, vibration-resistant internal thread in existing tapped or drilled holes. It features a 7\/16-20 UNF internal thread and a 5\/8-11 external thread, with an overall length of 21\/32 inches (0.656 inches). Manufactured from C12L14 carbon steel with a smooth, rolled finish, this insert delivers consistent thread engagement in metal parent materials. The self-lock wall design prevents the insert from backing out under dynamic load, making it well-suited for high-vibration assemblies. Licensed trades and manufacturing maintenance technicians install this type of insert when a stripped or undersized thread needs to be restored or reinforced to full load-bearing capacity.\u003c\/p\u003e\n\u003cp\u003eThis insert is intended for applications requiring a permanent, locking thread repair or upgrade in carbon steel, cast iron, or similarly machinable parent materials. The 5\/8-11 external thread drives into a standard tapped hole, and the 7\/16-20 internal thread accepts a corresponding UNF fastener at a 2B class of fit. Typical installations include mechanical assemblies, industrial equipment, and maintenance-repair scenarios where thread integrity under torque and vibration is critical. The standard tap type compatibility means no special tooling is required beyond a conventional 5\/8-11 tap.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSelf-lock wall design resists backing out under vibration and dynamic loading\u003c\/li\u003e\n  \u003cli\u003e7\/16-20 UNF internal thread (Class 2B fit) accepts standard UNF fasteners\u003c\/li\u003e\n  \u003cli\u003e5\/8-11 external thread (Class 2A fit) installs with a standard tap  -  no special tooling required\u003c\/li\u003e\n  \u003cli\u003eC12L14 carbon steel construction for reliable strength in metal parent materials\u003c\/li\u003e\n  \u003cli\u003eSmooth, rolled finish for consistent installation and thread engagement\u003c\/li\u003e\n  \u003cli\u003eOverall length of 21\/32 inches (0.656 inches) suits typical fastener depth requirements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style threaded insert for use in metal parent materials tapped to a 5\/8-11 thread, accepting 7\/16-20 UNF fasteners  -  suitable for thread repair and reinforcement applications in mechanical and industrial assemblies.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by machinists, maintenance technicians, or mechanical tradespeople. The parent material hole must be tapped to the correct 5\/8-11 specification before driving the insert. Power down and de-energize any associated equipment before beginning thread repair work on in-service machinery. Do not exceed the rated thread engagement depth for the parent material, and verify insert seating is flush or below the parent material surface before torquing any mating fastener.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInternal Thread Size\u003c\/strong\u003e: 7\/16-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExternal Thread Size\u003c\/strong\u003e: 5\/8-11\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 21\/32 inches (0.656 inches)\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 Type\u003c\/strong\u003e: Self-Lock Wall\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: 0.0195 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: 329-720\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"E-Z LOK","offers":[{"title":"Default Title","offer_id":67911993000242,"sku":"329-720","price":27.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1b6bc4f251926bdadc239a9a6f305293.jpg?v=1791224360","url":"https:\/\/voomisupply.com\/products\/e-z-lok-329-720-thread-locking-insert-7-16-20-5-8-11-unf","provider":"Voomi Supply","version":"1.0","type":"link"}