{"product_id":"heli-coil-r1191-9-free-running-insert-9-16-18-unf","title":"Heli-coil R1191-9 Free Running Insert 9\/16-18 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HELI-COIL R1191-9 is a free running wire thread insert designed to create durable internal threads in stripped, damaged, or soft-material parent threads. Manufactured from stainless steel with a bright, uncoated finish, this insert provides corrosion-resistant thread repair or reinforcement in a 9\/16-18 UNF thread profile. It measures 0.844 inches in overall length at a 1-1\/2D length-to-diameter ratio and features 12-1\/2 free coils. The tanged design allows for standard installation with a drive mandrel and includes a breakoff tang for post-installation removal. Licensed technicians and machinists in HVAC, plumbing, and general mechanical trades routinely specify this insert for thread restoration in aluminum, cast iron, and steel housings.\u003c\/p\u003e\u003cp\u003eThis insert is suited for applications requiring reliable thread repair or thread strengthening in ferrous and non-ferrous base materials. Common installation scenarios include restoring threads in compressor housings, valve bodies, pump flanges, and equipment enclosures. The 9\/16-18 UNF thread standard is frequently encountered in hydraulic fittings, fastener joints, and precision mechanical assemblies. Each package contains 6 inserts, making it practical for field service kits and shop inventory.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e9\/16-18 UNF thread profile for compatibility with unified fine thread fastener systems\u003c\/li\u003e\n\u003cli\u003e0.844 inches overall length at a 1-1\/2D ratio for standard-depth thread engagement\u003c\/li\u003e\n\u003cli\u003e12-1\/2 free coils providing full thread-form support across insert length\u003c\/li\u003e\n\u003cli\u003eStainless steel construction with bright, uncoated finish for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eTanged design compatible with standard HELI-COIL installation tooling\u003c\/li\u003e\n\u003cli\u003ePackaged in quantities of 6 for shop and field use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in any parent material tapped to HELI-COIL STI specifications for a 9\/16-18 UNF free running insert installation. Requires the corresponding STI tap and installation mandrel sized for this insert series.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified mechanic or technician using the correct STI tap, installation tool, and tang breakoff tool for the 9\/16-18 series. The parent bore must be drilled and tapped to STI oversize dimensions before insert installation. Always de-energize, depressurize, and secure the equipment before performing any thread repair on live systems. Do not reuse a removed insert.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 9\/16-18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Insert Length\u003c\/strong\u003e: 0.844 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength to Diameter Ratio\u003c\/strong\u003e: 1-1\/2D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Free Coils\u003c\/strong\u003e: 12-1\/2\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\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.07 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: R1191-9\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELI-COIL","offers":[{"title":"Default Title","offer_id":52122892239154,"sku":"R1191-9","price":55.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8676c0b30126acf780d0eddac0a1f5bd.jpg?v=1790085647","url":"https:\/\/voomisupply.com\/products\/heli-coil-r1191-9-free-running-insert-9-16-18-unf","provider":"Voomi Supply","version":"1.0","type":"link"}