{"product_id":"osg-1241001-spiral-point-tap-5-16-18-unc-hss-oxide","title":"Osg 1241001 Spiral Point Tap 5\/16-18 Unc Hss Oxide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1241001 is a spiral point tap designed to cut 5\/16-18 UNC internal threads in through-hole applications. Built from high-speed steel with a steam oxide coating, this plug-chamfer tap drives chips forward ahead of the cutting edge, keeping the flute path clear during production tapping. It runs 3 flutes, carries an H5 thread limit, and meets a 2B class of fit  -  the standard tolerance for most general-purpose threaded fastener applications. Overall length is 2.719 inches with a thread length of 1.125 inches. Licensed machinists, toolmakers, and maintenance technicians install this tap in manual drill presses, CNC machining centers, and tapping arms.\u003c\/p\u003e\u003cp\u003eThis tap is suited for through-hole tapping in a wide range of ferrous and non-ferrous materials. The steam oxide finish reduces friction and provides light corrosion resistance, making it a practical choice for production runs and maintenance work alike. Confirmed material applications include aluminum, cast aluminum, cast iron, hardened steel, high-carbon steel, low-carbon steel, and medium-carbon steel. The plug chamfer profile  -  typically 3 to 5 threads of chamfer lead  -  makes this tap well suited to through-hole threading where chip evacuation ahead of the tap is the priority over bottom-of-hole reach.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSpiral point geometry pushes chips forward, reducing clogging in through-hole applications\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction handles a broad range of workpiece materials including hardened steel\u003c\/li\u003e\n\u003cli\u003eSteam oxide coating lowers friction and extends tool life in dry or lightly lubricated tapping\u003c\/li\u003e\n\u003cli\u003eH5 thread limit and 2B class of fit meet standard fastener assembly tolerances\u003c\/li\u003e\n\u003cli\u003eRight-hand thread direction, plug chamfer  -  compatible with standard tapping equipment and tap holders\u003c\/li\u003e\n\u003cli\u003e3 flutes provide a balance of chip room and cutting edge support\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in standard straight-shank tap holders, tapping chucks, and floating tap holders that accept a 0.318-inch shank diameter. Suitable for manual and CNC through-hole tapping operations in the materials listed above.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or maintenance technician using appropriate cutting fluid or tapping compound for the workpiece material. The workpiece must be securely fixtured before tapping begins. Ensure the tap is properly aligned with the drilled pilot hole to prevent tap breakage. Never reverse-run a spiral point tap to break chips  -  the forward chip ejection design is intended for continuous through-hole passes.\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: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Plug\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\u003eThread Direction\u003c\/strong\u003e: Right Hand\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: Steam Oxide\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: 1.125 inches\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\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: 1241001\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51741186457906,"sku":"1241001","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ef570e0a877fdb1f765aa8749ca1dd59.jpg?v=1788829904","url":"https:\/\/voomisupply.com\/products\/osg-1241001-spiral-point-tap-5-16-18-unc-hss-oxide","provider":"Voomi Supply","version":"1.0","type":"link"}