{"product_id":"osg-7004400-spiral-point-sti-tap-4-48-unf-2-flute-hss","title":"Osg 7004400 Spiral Point Sti Tap 4-48 Unf 2 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 7004400 is a spiral point STI tap designed for cutting 4-48 UNF threads in preparation for Heli-Coil or similar wire thread insert installations. Built from high-speed steel (HSS) with a bright\/uncoated finish, this plug-chamfer tap is suited for through-hole tapping applications where chip evacuation is a priority. The spiral point geometry pushes chips forward ahead of the cutting teeth, reducing the risk of chip packing in blind or deep holes. With an overall length of 1.875 inches and a thread length of 9\/16 inches, the 7004400 fits standard tap holders and handles used in maintenance, repair, and production machining environments. Installation is performed by machinist or maintenance technicians.\u003c\/p\u003e\n\u003cp\u003eThis tap is used in applications requiring STI (Screw Thread Insert) thread preparation, specifically for 4-48 UNF fastener systems. It is commonly used when repairing stripped threads in aluminum, steel, and similar materials, or when engineering a stronger threaded connection using a wire thread insert. The plug chamfer style makes it appropriate for through-holes and starting threads in open bores. Helicoil reference number 04FSA applies to this tap, confirming its intended use with standard Heli-Coil insert systems in that thread size.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSpiral point geometry pushes chips forward, reducing packing in through-hole applications\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer provides a gradual thread lead-in, suitable for through-hole tapping\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction handles a broad range of workpiece materials\u003c\/li\u003e\n  \u003cli\u003eH2 thread limit provides tight tolerance control for consistent insert fitment\u003c\/li\u003e\n  \u003cli\u003eBright\/uncoated finish  -  no coating buildup to alter cutting geometry\u003c\/li\u003e\n  \u003cli\u003eHelicoil reference 04FSA confirmed for Heli-Coil wire thread insert compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with Heli-Coil wire thread insert systems; Helicoil reference number 04FSA. Intended for tapping 4-48 UNF STI threads in through-hole configurations using standard tap holders.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or maintenance technicians using a standard tap wrench, hand tap holder, or low-speed tapping attachment. The workpiece should be secured and the correct STI drill size used prior to tapping. Apply cutting fluid appropriate to the workpiece material to extend tool life and improve thread finish. Follow the insert manufacturer's specifications for drill diameter and tap depth to ensure proper insert engagement.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-48\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\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: H2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.875 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.5625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.141 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.1875 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelicoil Reference Number\u003c\/strong\u003e: 04FSA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 125\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: 7004400\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51743508955442,"sku":"7004400","price":40.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/56f9ece7321134a11eb7033add60931c.jpg?v=1788847847","url":"https:\/\/voomisupply.com\/products\/osg-7004400-spiral-point-sti-tap-4-48-unf-2-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}