{"product_id":"e-z-lok-303-720-thread-locking-insert-7-16-20-unf-stainless","title":"E-z Lok 303-720 Thread Locking Insert 7\/16-20 Unf Stainless","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe E-Z LOK 303-720 is a self-locking threaded insert machined from 303-grade stainless steel, designed to provide a secure, vibration-resistant internal thread in materials where thread integrity is critical. The insert 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). It is installed into a pre-tapped or drilled host material using a standard tap, making it a practical choice for maintenance technicians, machinists, and field service professionals who need to repair or upgrade threaded connections in metal assemblies.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for applications where a stronger or locking thread is required in aluminum, soft steel, plastics, or other base materials. The self-lock wall design applies radial pressure against the mating fastener to resist loosening under vibration or cyclic loading. Typical use cases include equipment repair, custom fabrication, and thread-size conversion in industrial and mechanical assemblies. It is appropriate for both shop and field installation scenarios.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSelf-lock wall design resists loosening under vibration and dynamic loads\u003c\/li\u003e\n  \u003cli\u003e303 stainless steel construction provides corrosion resistance and durability\u003c\/li\u003e\n  \u003cli\u003e7\/16-20 UNF internal thread with a 2B class of fit for standard fastener compatibility\u003c\/li\u003e\n  \u003cli\u003e5\/8-11 external thread with a 2A class of fit for installation into standard tapped holes\u003c\/li\u003e\n  \u003cli\u003e21\/32-inch overall length (0.656 inches) suits shallow to moderate-depth host materials\u003c\/li\u003e\n  \u003cli\u003eBright finish with no coating that could affect thread tolerances\u003c\/li\u003e\n  \u003cli\u003eCompatible with standard tap types  -  no specialty tooling required for installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style threaded repair and conversion insert for host materials tapped to accept a 5\/8-11 external thread, delivering a 7\/16-20 UNF internal thread in the installed position.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or maintenance technicians using standard hand or machine tapping equipment. The host material must be tapped to 5\/8-11 prior to driving the insert. De-energize or lock out any equipment before servicing threaded connection points. Avoid over-driving the insert beyond the specified overall length to prevent damage to the host material threads.\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\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: 0.019 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: 303-720\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"E-Z LOK","offers":[{"title":"Default Title","offer_id":67908625957170,"sku":"303-720","price":56.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3d673302ce2de33d70f4d06c14469f5b.jpg?v=1791184181","url":"https:\/\/voomisupply.com\/products\/e-z-lok-303-720-thread-locking-insert-7-16-20-unf-stainless","provider":"Voomi Supply","version":"1.0","type":"link"}