{"product_id":"osg-1712901-spiral-point-sti-plug-tap-8-32-unc","title":"Osg 1712901 Spiral Point Sti Plug Tap 8-32 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1712901 is a spiral point STI plug tap designed for tapping screw-thread inserts in ferrous and non-ferrous materials. It cuts an 8-32 UNC thread profile using three flutes arranged in a spiral point geometry that pushes chips forward ahead of the tap, reducing chip packing in through-hole applications. The tap is ground from vanadium high-speed steel for elevated wear resistance and toughness compared to standard M2 HSS. An oxide finish provides a baseline level of lubricity and corrosion protection. Overall length is 2.382 inches with a thread length of 0.44 inches. Thread limit is H3, suited to standard tolerance STI insert threads. This is a Series 301 OSG tap sold as a single unit.\u003c\/p\u003e\n\u003cp\u003eThis tap is used in machine shop, maintenance, and field repair applications where helical coil or STI-type thread inserts are being installed. Typical use cases include restoring damaged threads in aluminum engine components, steel structural members, and cast housings where a standard tap would not produce the correct insert-ready thread form. It is installed by machinists, tool-and-die technicians, and field service mechanics using a tapping machine, CNC machining center, or hand tap wrench depending on the job setup. The plug chamfer style makes it suitable for through holes and blind holes with adequate depth clearance.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSpiral point geometry pushes chips forward, reducing chip packing in through-hole tapping operations\u003c\/li\u003e\n  \u003cli\u003eVanadium high-speed steel construction provides improved wear resistance over standard HSS\u003c\/li\u003e\n  \u003cli\u003eOxide finish adds baseline lubricity and surface protection\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit ground for accurate STI insert-thread tolerances\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer style works in both through-holes and blind holes with sufficient depth\u003c\/li\u003e\n  \u003cli\u003eCompact shank diameter of 0.22 inches fits standard tap holders and collets for this size range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style STI plug tap for use with helical coil thread insert systems requiring an 8-32 UNC insert-ready thread form. Confirm insert manufacturer specifications for required tap series and thread limit before use.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap should be installed and operated by qualified machinists or mechanics familiar with thread insert tapping procedures. Always secure the workpiece and use appropriate cutting fluid or tapping compound for the material being tapped. Verify spindle speed and feed rate against the tap manufacturer recommendations for the material; running too fast without lubrication is the primary cause of tap breakage. For hand tapping, use a calibrated tap wrench and advance the tap with consistent pressure, backing off periodically to break chips.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 8-32\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 32\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Style\u003c\/strong\u003e: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.382 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.44 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.22 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.1310 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.28125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Vanadium High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 301\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.023 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: OSG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1712901\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51743506366770,"sku":"1712901","price":41.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a93b82529f0723d123d07c8038263df0.jpg?v=1788847794","url":"https:\/\/voomisupply.com\/products\/osg-1712901-spiral-point-sti-plug-tap-8-32-unc","provider":"Voomi Supply","version":"1.0","type":"link"}