{"product_id":"heli-coil-r3745-14-free-running-insert-m14-x-1-5-21mm","title":"Heli-coil R3745-14 Free Running Insert M14 X 1.5 21mm","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HELI-COIL R3745-14 is a tanged, free running wire thread insert designed to repair or reinforce M14 x 1.5 metric fine threaded holes in metal components. Manufactured from stainless steel with a bright, uncoated finish, this insert provides a durable, wear-resistant thread form in parent materials that are softer or prone to thread damage. The coiled-wire design distributes clamping load evenly across the full thread engagement length of 21 mm, which corresponds to a 1.5D length-to-diameter ratio. Machinists, engine rebuilders, and maintenance technicians use these inserts to restore stripped or damaged threads to OEM specifications without replacing the entire component.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for high-stress threaded connections in automotive, aerospace, industrial equipment, and general manufacturing applications where metric fine thread integrity is critical. The M14 x 1.5 thread size is common on cylinder head bolts, suspension fasteners, and precision machinery. The tanged design allows installation with a standard HELI-COIL tang break-off tool after the insert is driven to the correct depth. Each package contains 6 inserts, making it practical for both single repairs and short-run production work.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM14 x 1.5 metric fine thread form for precision thread repair and reinforcement\u003c\/li\u003e\n  \u003cli\u003e21 mm overall insert length at a 1.5D length-to-diameter ratio for full thread engagement\u003c\/li\u003e\n  \u003cli\u003eStainless steel construction resists corrosion and withstands elevated operating temperatures\u003c\/li\u003e\n  \u003cli\u003eTanged design compatible with standard HELI-COIL installation tooling for controlled depth seating\u003c\/li\u003e\n  \u003cli\u003e11-3\/8 free coils provide consistent spring tension and positive locking in the parent bore\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish suitable for applications where coating thickness tolerance is critical\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style thread repair insert for any application requiring a M14 x 1.5 metric fine threaded hole, including ferrous and non-ferrous parent materials.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation requires a correctly sized HELI-COIL drill, tap, and installation tool set matched to the M14 x 1.5 thread size. The parent material bore must be drilled and tapped to the insert-series specification before driving the insert. Once the insert is seated flush to one pitch below the surface, use the tang break-off tool to remove the driving tang. Always follow applicable torque and fastener specifications provided by the equipment manufacturer for the final assembled fastener.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: M14 x 1.5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: Metric Fine\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Insert Length\u003c\/strong\u003e: 21 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength to Diameter Ratio\u003c\/strong\u003e: 1.5D\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Free Coils\u003c\/strong\u003e: 11-3\/8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTang\u003c\/strong\u003e: Tanged\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 6 inserts\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: R3745-14\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":52062211637554,"sku":"R3745-14","price":67.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2303d340f6c600a0f59fc8a0530d2435.jpg?v=1790042303","url":"https:\/\/voomisupply.com\/products\/heli-coil-r3745-14-free-running-insert-m14-x-1-5-21mm","provider":"Voomi Supply","version":"1.0","type":"link"}