{"product_id":"osg-1171300-straight-flute-tap-3-8-16-unc-plug-hss","title":"Osg 1171300 Straight Flute Tap 3\/8-16 Unc Plug Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1171300 is a straight flute tap designed for cutting internal threads in a range of ferrous and non-ferrous materials. Built from high-speed steel (HSS) with a bright, uncoated finish, it cuts a 3\/8-16 UNC thread profile to a 3B class of fit with an H3 thread limit. The plug chamfer  -  typically 3 to 5 threads  -  makes it suitable for through-hole and most blind-hole applications where starting the thread straight is a priority. Overall length is 2-15\/16 inches with a thread length of 1-1\/4 inches. Machinists, tool-and-die technicians, and maintenance professionals use this tap in both manual and machine tapping setups.\u003c\/p\u003e\u003cp\u003eThis tap is used in general-purpose tapping applications across manufacturing, maintenance, repair, and fabrication environments. It is rated for use in aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel. The 3-flute straight flute geometry provides good chip clearance and is well-suited for use with standard tapping fluids in both horizontal and vertical orientations. It fits standard tap handles and machine tap holders sized for the 3\/8-inch shank diameter.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e3\/8-16 UNC thread form, 3B class of fit, H3 thread limit for consistent tolerance control\u003c\/li\u003e\n\u003cli\u003ePlug chamfer (3-5 thread lead) for easy thread starting in through-holes and most blind holes\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction for durability across a wide range of workpiece materials\u003c\/li\u003e\n\u003cli\u003e3 straight flutes for efficient chip evacuation during tapping\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish  -  no coating buildup concerns on close-tolerance threads\u003c\/li\u003e\n\u003cli\u003eRight-hand thread direction, compatible with standard tap handles and tapping heads\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or standard tooling tap for 3\/8-16 UNC thread applications. Compatible with material types including aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel as specified by the manufacturer.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall using a properly sized tap handle or machine tapping attachment rated for the shank diameter. Secure the workpiece before tapping and apply appropriate cutting fluid for the workpiece material to reduce heat and extend tap life. Reverse the tap periodically during hand tapping to break chips and prevent binding. Inspect the tap for wear or damage before each use  -  a dull or chipped tap should not be forced, as it risks breakage inside the workpiece.\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\u003eThreads per Inch\u003c\/strong\u003e: 16\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: H3\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\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\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-15\/16 inches (2.937 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.381 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.4375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.286 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.4134 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.072 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 103\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: 1171300\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51740599517490,"sku":"1171300","price":27.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/40a9095f0370e3f38070233648c0d30e.jpg?v=1788826116","url":"https:\/\/voomisupply.com\/products\/osg-1171300-straight-flute-tap-3-8-16-unc-plug-hss","provider":"Voomi Supply","version":"1.0","type":"link"}