{"product_id":"osg-1712401-spiral-point-sti-tap-2-56-unc-plug-hss","title":"Osg 1712401 Spiral Point Sti Tap 2-56 Unc Plug Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1712401 is a spiral point STI tap designed for tapping screw thread insert (STI) holes to the 2-56 UNC thread standard. It is ground from vanadium high-speed steel and carries an oxide finish for basic lubricity and corrosion resistance during storage. The plug chamfer configuration provides gradual thread engagement, making it well-suited for through-hole tapping applications. With 2 flutes and an H2 thread limit, this tap produces consistent, controlled threads in a variety of workpiece materials. Overall length is 1.882 inches, and thread length is 0.259 inches. Licensed machinists, tool-and-die makers, and precision metalworkers are the primary users of this tap.\u003c\/p\u003e\u003cp\u003eThis tap is used in applications where a screw thread insert is being installed into a tapped hole, most commonly in aerospace, industrial maintenance, and precision machining environments. The 2-56 UNC thread size targets fine, small-diameter fastening situations where STI inserts are required to restore or reinforce thread integrity. The plug chamfer makes it appropriate for through-hole work where chip ejection ahead of the tap is an advantage. Series 301 designates this as part of OSG's standard STI tap line.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e2-56 UNC thread form sized for STI insert installation\u003c\/li\u003e\n\u003cli\u003eVanadium high-speed steel construction for wear resistance in production tapping\u003c\/li\u003e\n\u003cli\u003eOxide finish provides basic surface protection and run-in lubricity\u003c\/li\u003e\n\u003cli\u003ePlug chamfer enables smooth entry and is optimized for through-hole tapping\u003c\/li\u003e\n\u003cli\u003eH2 thread limit ensures tight, consistent thread tolerance control\u003c\/li\u003e\n\u003cli\u003eCompact 1.882-inch overall length suited for small workpieces and restricted-access setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in STI tapping applications requiring a 2-56 UNC thread form; intended for use with corresponding 2-56 STI insert systems in through-hole configurations.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap is installed by machinists using a tap wrench, tapping head, or CNC rigid-tapping setup. Secure the workpiece fully before tapping and apply appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Do not force the tap if resistance increases unexpectedly, as breakage in small-diameter taps is difficult to recover from. Follow applicable shop safety procedures and manufacturer recommendations for cutting speeds.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 2-56\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer\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: 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\u003eOverall Length\u003c\/strong\u003e: 1.882 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.259 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\u003eSquare Size\u003c\/strong\u003e: 0.1100 inches\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: 0.009 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: 1712401\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51740164456754,"sku":"1712401","price":79.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0cd496b364a0c66dd114aa2e3750973e.jpg?v=1788823066","url":"https:\/\/voomisupply.com\/products\/osg-1712401-spiral-point-sti-tap-2-56-unc-plug-hss","provider":"Voomi Supply","version":"1.0","type":"link"}