{"product_id":"osg-1242600-spiral-point-plug-tap-1-2-20-unf-hss","title":"Osg 1242600 Spiral Point Plug Tap 1\/2-20 Unf Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1242600 is a spiral point plug tap designed for threading 1\/2-20 UNF internal threads in a wide range of ferrous and non-ferrous materials. Built from high-speed steel with a bright finish, it features a 3-flute spiral point geometry that pushes chips forward ahead of the cutting zone, keeping the flutes clear during through-hole tapping operations. The plug chamfer provides a gradual lead-in for controlled thread engagement. With an H5 thread limit and a 2B class of fit, this tap produces threads within standard tolerance for most general-purpose fastener applications. Machinists, tool and die makers, and maintenance technicians rely on this tool for consistent thread quality in production and repair settings.\u003c\/p\u003e\u003cp\u003eThe 1242600 is suited for through-hole tapping in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. The spiral point design makes it especially effective in materials that produce long, stringy chips, since the geometry actively directs chips out of the cutting path. It is appropriate for both CNC and manual tapping operations where through-hole access is available.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSpiral point geometry pushes chips forward for unobstructed through-hole tapping\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction supports a broad range of workpiece materials including hardened steel\u003c\/li\u003e\n\u003cli\u003ePlug chamfer provides gradual thread engagement and reduces tap breakage risk\u003c\/li\u003e\n\u003cli\u003eH5 thread limit and 2B class of fit for standard general-purpose thread tolerance\u003c\/li\u003e\n\u003cli\u003eRight-hand thread direction; no coolant-through required\u003c\/li\u003e\n\u003cli\u003eBright finish with no coating — suitable for use with standard cutting fluids\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for through-hole tapping of 1\/2-20 UNF threads in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel workpieces.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eSecure the workpiece firmly before tapping; any movement during operation increases the risk of tap breakage. Use an appropriate cutting fluid for the workpiece material and apply consistent, even feed pressure — never force a tap. For manual tapping, use a calibrated tap wrench sized for the shank diameter. Back the tap out periodically to break chips when working in deeper holes, even in through-hole applications with tougher materials.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-20 UNF\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: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Bright\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.941 inches (1-21\/32 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.367 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterrupted Thread\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 105\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.115 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: 1242600\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51748664934706,"sku":"1242600","price":53.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d654919f363fe5ed83f716bad1e1daa9.jpg?v=1788896368","url":"https:\/\/voomisupply.com\/products\/osg-1242600-spiral-point-plug-tap-1-2-20-unf-hss","provider":"Voomi Supply","version":"1.0","type":"link"}