{"product_id":"hertel-k007168as-hss-hand-sti-tap-3-4-10-unc-h3-4-flute","title":"Hertel K007168AS Hss Hand Sti Tap 3\/4-10 Unc H3 4 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL K007168AS is a high speed steel hand STI tap designed for cutting Screw Thread Insert (STI) threads in a 3\/4-10 UNC configuration. With an H3 tolerance class, this tap produces threads sized to accept helical wire inserts, restoring or creating strong threaded connections in parent materials that require insert reinforcement. The plug chamfer geometry — typically 3 to 5 threads of lead — makes it well suited for through-hole applications where the tap can pass fully through the material. Overall length is 4-11\/16 inches with a thread length of 2-7\/32 inches. The bright finish indicates an uncoated tool, standard for general-purpose HSS cutting applications. Machinists and maintenance technicians use this tap in hand-tapping operations.\u003c\/p\u003e\n\u003cp\u003eThis tap is used wherever a Screw Thread Insert must be installed into a 3\/4-10 UNC tapped hole. Common applications include repair of stripped threads in aluminum, cast iron, steel, and other machinable materials, as well as OEM production where insert-reinforced threads are specified by design. It is appropriate for both shop and field repair scenarios in manufacturing, maintenance, and heavy equipment service environments. The Helicoil reference number for this tap is 8187-12, making cross-referencing to insert system kits straightforward.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e3\/4-10 UNC STI thread form sized for helical wire thread inserts\u003c\/li\u003e\n  \u003cli\u003eH3 tolerance class for consistent fit with standard STI insert systems\u003c\/li\u003e\n  \u003cli\u003e4-flute design provides good chip clearance in hand-tapping operations\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer (3-5 thread lead) suited for through-hole applications\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction handles a wide range of machinable materials\u003c\/li\u003e\n  \u003cli\u003eBright finish uncoated surface — ready for general-purpose use without additional treatment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eCompatible with Helicoil STI insert systems as referenced by Helicoil number 8187-12. Designed for use with standard 3\/4-10 UNC helical wire thread inserts in through-hole repair and production tapping applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap is intended for hand-tapping operations performed by machinists or maintenance technicians. Before tapping, secure the workpiece firmly and ensure the starter hole is drilled to the correct STI tap drill diameter for 3\/4-10 UNC inserts as specified by the insert manufacturer. Apply cutting fluid appropriate for the parent material to extend tool life and improve thread finish. Never force the tap — back off periodically to break chips and prevent tap breakage.\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 Type\u003c\/strong\u003e: STI (Screw Thread Insert)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTolerance Class\u003c\/strong\u003e: H3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Bright (Uncoated)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 4-11\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 2-7\/32 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.2 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelicoil Reference Number\u003c\/strong\u003e: 8187-12\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: HERTEL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: K007168AS\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51750961479986,"sku":"K007168AS","price":141.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f1b9a617a9a8a4aa47796728c9b578f5.jpg?v=1788920838","url":"https:\/\/voomisupply.com\/products\/hertel-k007168as-hss-hand-sti-tap-3-4-10-unc-h3-4-flute","provider":"Voomi Supply","version":"1.0","type":"link"}