{"product_id":"osg-1241602-spiral-point-tap-3-8-16-unc-plug-2b-hss","title":"Osg 1241602 Spiral Point Tap 3\/8-16 Unc Plug 2B Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1241602 is a spiral point tap designed for threading through-holes in a wide range of metals and alloys. It cuts a 3\/8-16 UNC right-hand thread to a 2B class of fit and features a plug chamfer for controlled thread engagement at the start of the cut. The tap is manufactured from high-speed steel and carries an elektraLUBE coating that reduces friction and heat buildup during cutting, extending tool life in production and maintenance applications. Three flutes provide chip clearance while the spiral point geometry pushes chips ahead of the tap and out of the hole, making it well suited for through-hole tapping operations.\u003c\/p\u003e\u003cp\u003eThis tap is intended for use in through-hole applications across a broad range of materials including low-carbon steel, medium-carbon steel, high-carbon steel, hardened steel, cast iron, aluminum, and cast aluminum. It fits standard machining, maintenance, and repair workflows where a 3\/8-16 UNC internal thread is required. The H5 thread limit provides a controlled oversize condition appropriate for plated finishes or applications requiring a snug 2B fit. The 1.25-inch thread length accommodates typical through-hole depths encountered in structural and mechanical assemblies.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e3\/8-16 UNC thread form with 2B class of fit for standard fastener compatibility\u003c\/li\u003e\n\u003cli\u003ePlug chamfer for smooth thread entry and reduced starting torque\u003c\/li\u003e\n\u003cli\u003eH5 thread limit suitable for applications requiring plated or close-tolerance threads\u003c\/li\u003e\n\u003cli\u003eelektraLUBE coating reduces friction and extends tool life across a wide material range\u003c\/li\u003e\n\u003cli\u003eSpiral point geometry pushes chips forward, keeping the flutes clear in through-hole cuts\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction handles steel, cast iron, and aluminum without requiring carbide tooling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a drop-in replacement tap for 3\/8-16 UNC through-hole tapping operations in ferrous and non-ferrous materials; compatible with standard tap handles, tapping heads, and CNC rigid tapping setups that accept a round-shank tap in this size range.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eSpiral point taps of this type are installed by a machinist or maintenance technician using a tap wrench, tapping stand, or CNC tapping cycle. Always match the tap drill size to the required thread percentage before starting; a letter Q drill is commonly used for 3\/8-16 UNC to achieve approximately 75 percent thread engagement. Ensure the workpiece is securely fixtured and use cutting fluid or the built-in elektraLUBE coating benefit to maintain proper lubrication, particularly in steel and cast iron. Do not reverse the tap under power in a rigid tapping setup without confirming the machine spindle supports synchronized reversing.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/8-16 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\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\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: elektraLUBE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOversize\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\u003eMaterial Application\u003c\/strong\u003e: Aluminum, Cast Aluminum, Cast Iron, Hardened Steel, High-Carbon Steel, Low-Carbon Steel, Medium-Carbon Steel\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: 1241602\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51750213026098,"sku":"1241602","price":38.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/fe23c38c7233bcc97caa2ea21cdf4402.jpg?v=1788914347","url":"https:\/\/voomisupply.com\/products\/osg-1241602-spiral-point-tap-3-8-16-unc-plug-2b-hss","provider":"Voomi Supply","version":"1.0","type":"link"}