{"product_id":"osg-1302000501-spiral-flute-tap-1-4-20-unc-hss-oxide","title":"Osg 1302000501 Spiral Flute Tap 1\/4-20 Unc Hss Oxide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1302000501 is a spiral flute tap designed for cutting 1\/4-20 UNC internal threads in a wide range of ferrous and non-ferrous materials. Built from high-speed steel (HSS) with a steam oxide finish, this tap runs a right-hand spiral flute at a 45-degree helix angle, which helps evacuate chips up and out of the hole during through-hole and blind-hole tapping operations. The plug chamfer provides a gradual thread lead-in and distributes cutting forces across several teeth. Class 3B fit tolerance and H3 thread limit make it suitable for close-tolerance threaded assemblies where dimensional consistency is critical. Overall length is 2.5 inches and the part weighs approximately 0.03 pounds.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for use in machine tapping and hand tapping operations across production and maintenance environments. It is designed to cut threads in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The spiral flute geometry performs well in both through-hole and short blind-hole applications where chip clearance is a consideration. It fits standard 1\/4-inch tap holders and collet-style tooling common in CNC machining centers, drill presses, and tapping heads.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-20 UNC thread form, Class 3B fit, H3 thread limit for close-tolerance threading\u003c\/li\u003e\n  \u003cli\u003e45-degree right-hand spiral flute promotes upward chip evacuation during tapping\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer distributes cutting load and eases thread engagement\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction with steam oxide coating for wear resistance and lubricity\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction compatible with standard tapping setups\u003c\/li\u003e\n  \u003cli\u003eRated for aluminum, cast iron, and carbon steel applications in a single tool\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard 1\/4-inch tap holders as an OEM-style spiral flute tap for 1\/4-20 UNC threading in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel workpieces. Part of OSG Series 13020.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or maintenance technicians using standard tapping equipment. Always apply appropriate cutting fluid or tapping compound for the workpiece material before starting the tap. Ensure the tap is aligned perpendicular to the workpiece surface to avoid thread damage or tap breakage. Reverse the tap periodically during hand tapping to break and clear chips, and never force a tap against bottoming resistance in a blind hole.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 20\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\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\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 45 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\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\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: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.397 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.255 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 0.996 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.3125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.191 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.03 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 13020\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: 1302000501\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51728354279730,"sku":"1302000501","price":40.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/32ce0cb361ff5159c63e9f4b8ba6c2de.jpg?v=1788690612","url":"https:\/\/voomisupply.com\/products\/osg-1302000501-spiral-flute-tap-1-4-20-unc-hss-oxide","provider":"Voomi Supply","version":"1.0","type":"link"}