{"product_id":"e-z-lok-303-820-thread-locking-insert-1-2-20-unf","title":"E-z Lok 303-820 Thread Locking Insert 1\/2-20 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe E-Z LOK 303-820 is a self-lock wall thread locking insert designed to provide a secure, threaded connection in materials that require a stronger internal thread than the base material can supply on its own. This insert features a 1\/2-20 internal thread and a 3\/4-10 external thread, both conforming to UNF standards. Manufactured from grade 303 stainless steel with a bright finish, it delivers corrosion resistance and reliable performance in demanding environments. The overall length is 21\/32 inches (0.656 inches). It is installed by machinists, maintenance technicians, and assemblers working in metal fabrication, industrial equipment repair, and precision assembly applications.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for use in metalworking and mechanical assembly where a 1\/2-20 UNF internal thread is needed within a tapped 3\/4-10 hole. The self-lock wall design resists loosening under vibration and dynamic loads, making it appropriate for both original equipment manufacturing and field repair work. It is commonly specified for light industrial, instrumentation, and mechanical assembly contexts where thread integrity and resistance to rotation are required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/2-20 UNF internal thread with Class 2B fit for standard fastener engagement\u003c\/li\u003e\n  \u003cli\u003e3\/4-10 UNF external thread with Class 2A fit for installation into a standard tapped hole\u003c\/li\u003e\n  \u003cli\u003eSelf-lock wall design resists rotation and loosening under vibration\u003c\/li\u003e\n  \u003cli\u003eGrade 303 stainless steel construction provides corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eBright finish with an overall length of 21\/32 inches (0.656 inches)\u003c\/li\u003e\n  \u003cli\u003eCompatible with standard tap type for straightforward installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style thread repair and thread conversion insert for applications requiring a 1\/2-20 UNF internal thread installed into a 3\/4-10 tapped hole.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by a machinist or mechanical technician using standard tapping tools. Ensure the receiving hole is tapped to 3\/4-10 UNF specifications and is clean and free of debris before driving the insert. Power down and de-energize any equipment before performing thread repair or insert installation on in-service machinery. Follow applicable facility safety and torque procedures for the parent assembly.\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\/2-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExternal Thread Size\u003c\/strong\u003e: 3\/4-10\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\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: 21\/32 inches (0.656 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\u003eMaterial\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: 303\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\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: 0.031 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: 303-820\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"E-Z LOK","offers":[{"title":"Default Title","offer_id":67908191224114,"sku":"303-820","price":61.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2bb3c518b4281c244a7a77fb4a2895d6.jpg?v=1791182791","url":"https:\/\/voomisupply.com\/products\/e-z-lok-303-820-thread-locking-insert-1-2-20-unf","provider":"Voomi Supply","version":"1.0","type":"link"}