{"product_id":"osg-1141300-straight-flute-tap-3-8-16-unc-4-flutes-hss","title":"Osg 1141300 Straight Flute Tap 3\/8-16 Unc 4 Flutes Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1141300 is a straight flute tap designed for cutting 3\/8-16 UNC internal threads in a wide range of materials. Built from high-speed steel with a bright, uncoated finish, it features a plug chamfer that makes it suitable for through-hole and partial-depth tapping applications. The tap runs 2-15\/16 inches overall with a 1-1\/4 inch thread length and an H5 thread limit, delivering consistent tolerance control for 2B class of fit threads. With 4 flutes, it channels chips efficiently in the straight-flute configuration. Installation is performed by hand or with a tapping machine.\u003c\/p\u003e\n\u003cp\u003eThis tap is intended for use in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. It fits standard production and maintenance tapping operations in manufacturing, machining, and general metalworking environments. The plug chamfer provides a gradual thread lead-in, making it a reliable choice when starting a tap in a drilled hole where a full-length thread is required but the hole is not entirely through.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e3\/8-16 UNC thread form with 16 threads per inch and right-hand thread direction\u003c\/li\u003e\n  \u003cli\u003eH5 thread limit for controlled 2B class of fit tolerances\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer for versatile use in through-holes and deep blind holes\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction for durability across a broad material range\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish  -  no coating buildup to affect thread dimensions\u003c\/li\u003e\n  \u003cli\u003e4 straight flutes for chip management in short-chipping materials\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for tapping 3\/8-16 UNC threads in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel workpieces. Suitable for use with standard 3\/8-inch tap wrenches and tapping heads accepting a 0.381-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eMachinists and tool-and-die technicians should ensure the workpiece is properly clamped and the pilot hole is drilled to the correct tap drill size for 3\/8-16 UNC before starting. Apply appropriate cutting fluid to extend tap life and improve thread finish. Use a tap wrench or tapping attachment that holds the shank securely to maintain axial alignment and prevent tap breakage. Follow standard shop practices and machine guarding requirements when operating tapping equipment.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/8-16 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 16\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\u003eNumber of Flutes\u003c\/strong\u003e: 4\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\u003eThread Length\u003c\/strong\u003e: 1-1\/4 inches (0.937 inches decimal)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\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 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\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\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 101\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.073 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: 1141300\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51743296094514,"sku":"1141300","price":26.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/326d7ab8b02d8071a42bd324ef4f1ff7_77bed53d-8de8-413f-a346-96c8ae90a8b9.jpg?v=1788845243","url":"https:\/\/voomisupply.com\/products\/osg-1141300-straight-flute-tap-3-8-16-unc-4-flutes-hss","provider":"Voomi Supply","version":"1.0","type":"link"}