{"product_id":"osg-2530801-spiral-point-tap-5-16-18-unc-plug-h2-hss","title":"Osg 2530801 Spiral Point Tap 5\/16-18 Unc Plug H2 Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 2530801 is a spiral point plug tap designed for cutting 5\/16-18 UNC right-hand threads in through-hole applications. Built from vanadium high-speed steel (HSS-E) with a steam oxide coating, it delivers reliable wear resistance and reduced friction in production and maintenance threading work. The plug chamfer provides a gradual thread lead-in, making it well suited for through-hole tapping where chip ejection ahead of the tap is required. With 3 flutes, an H2 thread limit, and a 2B class of fit, this tap produces threads that meet standard fastener assembly tolerances. Overall length is 3.543 inches (90 mm) with a thread length of 1.125 inches.\u003c\/p\u003e\u003cp\u003eThe OSG 2530801 is appropriate for use in a wide range of metalworking applications including production tapping, maintenance and repair operations (MRO), and fabrication shops. The steam oxide finish improves lubricity and corrosion resistance during use. Compatible material applications include aluminum, low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, die steel, cast iron, and stainless steel. It is used by machinists, toolroom technicians, and maintenance trades requiring consistent 5\/16-18 UNC thread quality in through-hole work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSpiral point geometry pushes chips forward through the hole, reducing clogging in through-hole tapping\u003c\/li\u003e\n\u003cli\u003eVanadium HSS-E construction provides increased toughness and heat resistance over standard M2 HSS\u003c\/li\u003e\n\u003cli\u003eSteam oxide coating reduces friction and improves lubricity during cutting\u003c\/li\u003e\n\u003cli\u003ePlug chamfer (3-5 thread lead) allows gradual thread engagement for smooth starts\u003c\/li\u003e\n\u003cli\u003eH2 thread limit and 2B class of fit ensure threads meet standard fastener assembly tolerances\u003c\/li\u003e\n\u003cli\u003eRight-hand thread direction; no coolant-through requirement for general-purpose use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for cutting 5\/16-18 UNC right-hand internal threads in through-hole configurations across aluminum, cast iron, low- and medium-carbon steel, high-carbon steel, alloy steel, die steel, and stainless steel workpieces.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap is installed in a tapping chuck, tap wrench, or CNC rigid-tapping holder by a machinist or maintenance technician. Always drill the correct tap drill size for 5\/16-18 UNC before tapping and ensure the workpiece is securely fixtured. Apply appropriate cutting fluid or tapping compound for the workpiece material to extend tool life. Never force a tap against resistance; back off periodically to break chips when tapping manually.\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\u003eThread Direction\u003c\/strong\u003e: Right Hand\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: H2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Vanadium High-Speed Steel (HSS-E)\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: 3.543 inches (90 mm)\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\u003eOversize\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 250\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.065 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: 2530801\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51728122183986,"sku":"2530801","price":38.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/633cdb6ed1664c644b07c2448c2862b7.jpg?v=1788688355","url":"https:\/\/voomisupply.com\/products\/osg-2530801-spiral-point-tap-5-16-18-unc-plug-h2-hss","provider":"Voomi Supply","version":"1.0","type":"link"}