{"product_id":"heli-coil-3724-12-thread-insert-tool-3-4-10-unc","title":"Heli-coil 3724-12 Thread Insert Tool 3\/4-10 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HELI-COIL 3724-12 is a hand installation tool designed for driving threaded wire inserts into prepared holes. Built around a Type III threaded mandrel, it engages the insert tang and winds the coil into the tapped bore without power tools. The tool covers 3\/4-10 UNC thread size and accepts both free-running and locking insert styles. At 4-7\/8 inches in overall length with a 4-inch spinner diameter, it gives a mechanic solid grip and controlled torque during installation. Maintenance technicians, millwrights, and field service pros use this tool wherever stripped threads need to be rebuilt to original spec.\u003c\/p\u003e\n\u003cp\u003eThis tool is used in repair and overhaul work on threaded bores that have been re-tapped to accept HELI-COIL wire inserts. Typical applications include machinery frames, engine components, structural aluminum, and any substrate where thread damage requires a durable insert repair. The 3\/4-10 UNC designation covers coarse-thread fastener applications common in heavy equipment, manufacturing fixtures, and general industrial maintenance. Because it is a hand tool, it suits situations where a controlled, torque-sensitive installation is preferred over a power driver.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eType III threaded mandrel design for precise insert engagement and controlled wind-in\u003c\/li\u003e\n  \u003cli\u003eCompatible with both free-running and locking HELI-COIL insert styles at 3\/4-10 UNC\u003c\/li\u003e\n  \u003cli\u003e4-7\/8 inch overall length provides working clearance in most repair setups\u003c\/li\u003e\n  \u003cli\u003e4-inch spinner diameter allows firm hand grip and steady installation torque\u003c\/li\u003e\n  \u003cli\u003eUNC thread standard suits the most common coarse-thread fastener applications in industrial and mechanical work\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with 3\/4-10 UNC free-running and locking wire thread inserts requiring a Type III threaded mandrel for hand installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified mechanic or maintenance technician familiar with thread insert repair procedures. Before use, verify the host bore has been drilled and tapped to the correct HELI-COIL insert tap size for 3\/4-10 UNC. Wind the insert flush to one thread below the surface, then break off the drive tang using a tang break-off tool. Do not apply excessive side load to the mandrel during installation, as this can distort the insert coil.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/4-10 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMandrel Type\u003c\/strong\u003e: Type III Threaded Mandrel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Compatibility\u003c\/strong\u003e: Free-Running and Locking\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4-7\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpinner Diameter\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23291800\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: HELI-COIL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 3724-12\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":52016123773234,"sku":"3724-12","price":105.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/469edc5d40e2e76d7e158077eb48e8f6.jpg?v=1790008374","url":"https:\/\/voomisupply.com\/products\/heli-coil-3724-12-thread-insert-tool-3-4-10-unc","provider":"Voomi Supply","version":"1.0","type":"link"}