{"product_id":"osg-1302000901-spiral-flute-tap-3-8-16-unc-hss","title":"Osg 1302000901 Spiral Flute Tap 3\/8-16 Unc Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1302000901 is a spiral flute plug tap designed for cutting 3\/8-16 UNC internal threads in a wide range of ferrous and non-ferrous metals. Built from high-speed steel (HSS) with a steam oxide coating, it runs a 45-degree helix angle that evacuates chips upward out of the hole — the defining advantage of spiral flute geometry in blind-hole applications. The plug chamfer (3-5 threads) provides a balanced lead-in suitable for most through-hole and shallow blind-hole threading operations. Thread tolerance is H3, producing a 3B class of fit. Overall length is 2.938 inches with a shank diameter of 0.381 inches.\u003c\/p\u003e\u003cp\u003eThis tap is suited for general-purpose threading work in machine shops, maintenance facilities, and production environments. It performs in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The right-hand spiral flute design makes it compatible with standard CNC machining centers, knee mills, drill presses with tapping attachments, and hand tapping applications where the helix assists chip clearance. It carries no coolant-through capability, so flood or mist coolant is applied externally at the cutting zone.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e45-degree right-hand helix evacuates chips upward, ideal for blind-hole threading\u003c\/li\u003e\n\u003cli\u003ePlug chamfer with 3B class of fit and H3 thread limit for standard tolerance internal threads\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction withstands moderate cutting speeds across a broad material range\u003c\/li\u003e\n\u003cli\u003eSteam oxide coating reduces friction and provides light corrosion resistance during storage and cutting\u003c\/li\u003e\n\u003cli\u003eThread length of 0.5 inches and neck length of 1.251 inches suit typical fastener-depth applications\u003c\/li\u003e\n\u003cli\u003eNo coolant-through requirement simplifies use on equipment without internal coolant delivery\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for cutting 3\/8-16 UNC right-hand internal threads in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. Fits standard 3\/8-inch tap holders and collet chucks sized for a 0.381-inch shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by licensed machinists or qualified maintenance technicians using a tap wrench, tapping head, or rigid CNC tapping cycle. Ensure the workpiece is securely fixtured and the tap is aligned perpendicular to the drilled hole before engagement. Always use a cutting fluid appropriate for the workpiece material to extend tap life and improve thread finish. Follow applicable shop safety procedures and de-energize any powered equipment before hand-tapping in place.\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\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\u003eChamfer\u003c\/strong\u003e: Plug\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\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 16\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: Steam Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.938 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.5 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\u003eNeck Length\u003c\/strong\u003e: 1.251 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\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 13020\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.075 pounds\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: 1302000901\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51748801904946,"sku":"1302000901","price":60.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a26cb9424a1bca39de2bd23be5ab5d77.jpg?v=1788898611","url":"https:\/\/voomisupply.com\/products\/osg-1302000901-spiral-flute-tap-3-8-16-unc-hss","provider":"Voomi Supply","version":"1.0","type":"link"}