{"product_id":"osg-1715908-spiral-flute-sti-tap-6-32-unc-3-flute","title":"Osg 1715908 Spiral Flute Sti Tap 6-32 Unc 3 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1715908 is a spiral flute STI tap designed for cutting 6-32 UNC threads in insert-ready applications. Built from powdered metal with a V coating, this tap features a 45-degree helix angle and a semi-bottoming chamfer that allows threading close to the base of a blind hole. It carries a 3B class of fit, making it suitable for standard-tolerance threaded insert work. With an overall length of 2.375 inches and a shank diameter of 0.194 inches, it fits standard tap holders used in machine shop and production environments. Licensed machinists and tooling technicians install this tap in CNC machining centers, drill presses, and manual tapping setups.\u003c\/p\u003e\u003cp\u003eThis tap is built for STI (Screw Thread Insert) applications where a thread must be cut oversize to accept a helical insert such as a wire thread insert. The 6-32 UNC thread form, three right-hand flutes, and 0.311-inch thread length make it well suited for shallow-to-moderate depth tapping in metals including aluminum, steel, and similar machinable alloys. It is appropriate for both production runs and repair work where stripped or damaged threads need to be restored using an insert system.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e6-32 UNC STI thread form for use with helical wire thread inserts\u003c\/li\u003e\n\u003cli\u003e45-degree helix angle promotes chip evacuation in blind hole applications\u003c\/li\u003e\n\u003cli\u003eSemi-bottoming chamfer allows threading closer to hole bottom than a standard taper chamfer\u003c\/li\u003e\n\u003cli\u003ePowdered metal construction offers improved wear resistance over standard HSS\u003c\/li\u003e\n\u003cli\u003eV coating reduces friction and extends tool life in general-purpose tapping\u003c\/li\u003e\n\u003cli\u003e3B class of fit delivers standard tolerance thread geometry for insert compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in STI tapping applications requiring a 6-32 UNC oversize thread to accept a helical wire thread insert. Compatible with standard tap holders and collet chucks sized for a 0.194-inch shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap should be installed by a qualified machinist or tooling technician familiar with STI thread systems. Ensure the workpiece is securely fixtured and the spindle speed and feed rate are appropriate for the workpiece material before tapping. Apply cutting fluid rated for the material being tapped to reduce heat and improve thread finish. Never reverse the tap under power without confirming the machine and tap holder are configured for thread-cutting reversal.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 6-32 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\u003eHelix Angle\u003c\/strong\u003e: 45 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Semi-Bottoming\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 3B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.194 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.875 inches (0.311 decimal inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Powdered Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 315\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.015 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: OSG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1715908\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51737881608498,"sku":"1715908","price":79.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/abea129aabf490a130a041d4cdc8dc2e_9788da80-85a4-4910-a2fa-4fee760fd778.jpg?v=1788794818","url":"https:\/\/voomisupply.com\/products\/osg-1715908-spiral-flute-sti-tap-6-32-unc-3-flute","provider":"Voomi Supply","version":"1.0","type":"link"}