{"product_id":"osg-1225805-spiral-point-tap-5-16-18-unc-tin-hss","title":"Osg 1225805 Spiral Point Tap 5\/16-18 Unc Tin Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1225805 is a spiral point tap designed for cutting 5\/16-18 UNC internal threads in through-hole applications. Built from high-speed steel with a titanium nitride (TiN) coating, it delivers extended tool life and reduced friction compared to uncoated taps. The plug chamfer configuration allows progressive thread engagement over the first few threads, making it well-suited for production tapping in through holes. With 2 flutes and a right-hand thread direction, the 1225805 pushes chips forward ahead of the cut, keeping the flutes clear during operation. Overall length is 2.719 inches with a thread length of 0.724 inches.\u003c\/p\u003e\u003cp\u003eThis tap is rated for use across a broad range of workpiece materials including aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. It fits standard production and maintenance tapping operations in machine shops, fabrication facilities, and field service environments where 5\/16-18 UNC threads are required. The H2 thread limit designation makes it appropriate for general-purpose tolerance requirements in most standard threaded fastener assemblies.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e5\/16-18 UNC thread form with right-hand direction and H2 thread limit\u003c\/li\u003e\n\u003cli\u003eTiN coating reduces friction and extends tool life across varied material types\u003c\/li\u003e\n\u003cli\u003ePlug chamfer for progressive engagement in through-hole tapping\u003c\/li\u003e\n\u003cli\u003eSpiral point geometry pushes chips forward to keep the cutting zone clear\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction handles a wide range of ferrous and non-ferrous materials\u003c\/li\u003e\n\u003cli\u003eNo coolant-through requirement — compatible with standard flood or manual lubrication\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct-fit spiral point tap for 5\/16-18 UNC through-hole applications in machine tools, CNC tapping heads, and hand-tapping operations using standard tap holders for this thread size.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by machinists or qualified tradespeople using a properly sized tap wrench, tapping head, or CNC rigid tapping setup. Ensure the workpiece is securely fixtured and the tap is aligned perpendicular to the hole before engagement. Apply appropriate cutting fluid for the workpiece material to reduce heat and extend tap life. Follow applicable shop safety procedures and machinery guarding requirements when using power tapping equipment.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16-18 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: 2\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 Limit\u003c\/strong\u003e: H2\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: TiN (Titanium Nitride)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.719 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.724 inches (1-1\/8 inches nominal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.318 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterrupted Thread\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 105\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Aluminum, Cast Aluminum, Cast Iron, Hardened Steel, High-Carbon Steel, Low-Carbon Steel, Medium-Carbon Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.055 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: 1225805\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51731381748018,"sku":"1225805","price":39.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/040e1f6809fa4b4f493b5c3ee3c1e413.jpg?v=1788730270","url":"https:\/\/voomisupply.com\/products\/osg-1225805-spiral-point-tap-5-16-18-unc-tin-hss","provider":"Voomi Supply","version":"1.0","type":"link"}