{"product_id":"osg-1601807-straight-flute-tap-3-8-24-unf-bottoming-hss","title":"Osg 1601807 Straight Flute Tap 3\/8-24 Unf Bottoming Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1601807 is a straight flute bottoming tap designed for cutting 3\/8-24 UNF internal threads in machined components. With 4 flutes and an H3 thread limit, it produces accurate 3B class of fit threads suited to close-tolerance fastener applications. The tap is manufactured from high-speed steel (HSS) and carries a nitride\/oxide combination coating that reduces friction and extends tool life in production environments. The bottoming chamfer allows threading close to the bottom of blind holes. Overall length is 2-15\/16 inches with a thread length of 1-1\/4 inches. Licensed machinists, tool and die makers, and maintenance technicians are the primary users.\u003c\/p\u003e\n\u003cp\u003eThe OSG 1601807 is suited for tapping aluminum and cast iron workpieces in both production and job-shop settings. Its straight flute geometry works well in these short-chip materials where flute evacuation is straightforward. The bottoming chamfer makes it the correct choice when thread engagement must extend to the floor of a blind hole, a common requirement in fixture plates, brackets, and machined housings. It is not designed for through-hole or interrupted-thread applications where a spiral flute tap would be more appropriate.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e3\/8-24 UNF thread form with 3B class of fit for close-tolerance internal threads\u003c\/li\u003e\n  \u003cli\u003eBottoming chamfer allows threading to the bottom of blind holes\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit for consistent fit across production runs\u003c\/li\u003e\n  \u003cli\u003e4-flute straight flute design optimized for aluminum and cast iron\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction with nitride\/oxide coating for reduced friction and improved tool life\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction, no coolant-through requirement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for tapping aluminum and cast iron workpieces requiring 3\/8-24 UNF internal threads. Compatible with standard tap holders and chucks accepting a 0.381-inch shank diameter with a 0.286-inch square drive.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eTapping should be performed by a qualified machinist following standard threading procedures. Secure the workpiece and ensure the tap is aligned perpendicular to the drilled hole before engagement. Apply an appropriate cutting fluid for the workpiece material  -  sulfurized oil for cast iron and a light cutting fluid or kerosene-based lubricant for aluminum. Inspect the tap for wear or chipping before each use and replace if thread form or coating shows degradation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/8-24 UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 24\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\u003eChamfer\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1-1\/4 inches (0.937 inches decimal)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-15\/16 inches (2.937 inches decimal)\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 Size\u003c\/strong\u003e: 0.286 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\u003eNeck Length\u003c\/strong\u003e: 1.413 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\/Finish\u003c\/strong\u003e: Nitride\/Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Aluminum, Cast Iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 101C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.07 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 1601807\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51739991474482,"sku":"1601807","price":25.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7e8628e4ed0f5363fec090f85f53b2e4.jpg?v=1788821224","url":"https:\/\/voomisupply.com\/products\/osg-1601807-straight-flute-tap-3-8-24-unf-bottoming-hss","provider":"Voomi Supply","version":"1.0","type":"link"}