{"product_id":"osg-1650502408-spiral-flute-tap-3-8-16-unc-ticn-coated","title":"Osg 1650502408 Spiral Flute Tap 3\/8-16 Unc Ticn Coated","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1650502408 is a spiral flute tap designed for cutting 3\/8-16 UNC right-hand internal threads in a wide range of ferrous and non-ferrous metals. Built from powdered metal (grade PMT15) and coated with TiCN (Titanium Carbonitride), this tap delivers improved wear resistance and heat dissipation compared to standard high-speed steel tooling. It features a modified bottoming chamfer for threading close to the bottom of blind holes and a 45-degree helix angle that evacuates chips efficiently in the direction of the cut. Overall length is 3.54 inches (100 mm) with a thread length of 0.5 inches (12.7 mm). Licensed machinists and tool-and-die professionals specify this tap when tight tolerances and longer tool life matter in production environments.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for blind-hole threading applications across a broad material range including low-, medium-, and high-carbon steel, alloy steel, cast iron, cast aluminum, aluminum, and stainless steel. The 2B class of fit and H5 thread limit make it appropriate for standard commercial and precision fastener assemblies. The spiral flute geometry is particularly effective in shorter-chipping materials where straight-flute taps tend to pack chips. It is appropriate for use in CNC machining centers, tapping heads, and manual tapping operations with controlled feed.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e3\/8-16 UNC right-hand thread, 2B class of fit, H5 thread limit for consistent tolerance control\u003c\/li\u003e\n  \u003cli\u003e45-degree right-hand spiral flute design evacuates chips up and out of blind holes\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer allows threading to within a few threads of hole bottom\u003c\/li\u003e\n  \u003cli\u003eTiCN coating increases surface hardness and reduces friction against hard and abrasive workpiece materials\u003c\/li\u003e\n  \u003cli\u003ePowdered metal construction (PMT15 grade) provides finer grain structure and higher toughness than conventional HSS\u003c\/li\u003e\n  \u003cli\u003eNo coolant-through requirement — suitable for flood coolant or cutting oil external application\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for threading 3\/8-16 UNC blind holes in alloy steel, aluminum, cast aluminum, cast iron, hardened steel, high-carbon steel, low-carbon steel, medium-carbon steel, and stainless steel workpieces. Part of OSG Series 16505.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap should be installed by a qualified machinist following standard tapping procedures for the workpiece material and hole depth. Secure the workpiece and ensure the tapped hole is pre-drilled to the correct tap drill diameter for 3\/8-16 UNC before starting. Apply appropriate cutting fluid or tapping compound for the material being threaded; do not run the tap dry in steel or stainless. When using in a CNC application, program feed rate to match the 16 TPI pitch exactly to avoid tap breakage or thread form errors.\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\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Style\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 45 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Modified Bottoming\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\u003eThreads per Inch\u003c\/strong\u003e: 16\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.5 inches (12.7 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.54 inches (100 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTapping Depth\u003c\/strong\u003e: 39 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.318 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.377 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\u003eMaterial\u003c\/strong\u003e: Powdered Metal (PMT15)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN\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: 16505\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.104 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: 1650502408\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51739135443250,"sku":"1650502408","price":70.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/941d85457dec507334da6e0c91c54b8c.jpg?v=1788810023","url":"https:\/\/voomisupply.com\/products\/osg-1650502408-spiral-flute-tap-3-8-16-unc-ticn-coated","provider":"Voomi Supply","version":"1.0","type":"link"}