{"product_id":"osg-8011202-spiral-flute-sti-tap-1-4-20-unc-hss","title":"Osg 8011202 Spiral Flute Sti Tap 1\/4-20 Unc Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 8011202 is a high speed steel spiral flute tap designed for cutting STI (Screw Thread Insert) threads in a 1\/4-20 UNC configuration. It features a 50-degree helix angle that efficiently evacuates chips up and out of the hole during through-hole and blind-hole tapping operations. The bottoming chamfer allows threading close to the bottom of blind holes, making it suitable for applications where full thread depth near the base of a bore is required. The elektraLUBE surface finish provides lubricity to reduce friction and extend tool life in production environments. This tap is intended for use by machinists, maintenance technicians, and tool-room professionals working with ferrous and non-ferrous materials.\u003c\/p\u003e\n\u003cp\u003eThe OSG 8011202 is appropriate for creating STI threads used with helical wire inserts such as those commonly installed to repair or strengthen threaded holes in castings, housings, and structural components. It suits both manual tapping operations and machine tapping setups in light manufacturing, MRO, and precision machining environments. The 1\/4-20 UNC thread form and H3 thread limit make this tap compatible with standard STI insert specifications at this thread size. It is well suited for job shops, maintenance departments, and production lines where insert-threaded fastener systems are standard practice.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-20 UNC thread form for STI insert thread preparation\u003c\/li\u003e\n  \u003cli\u003e50-degree spiral flute helix for efficient chip evacuation in blind and through holes\u003c\/li\u003e\n  \u003cli\u003eBottoming chamfer allows threading to the base of blind holes\u003c\/li\u003e\n  \u003cli\u003eelektraLUBE finish reduces friction and extends tap service life\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit for consistent fit with standard STI inserts\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel construction provides toughness across a range of workpiece materials\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in STI tapping applications requiring a 1\/4-20 UNC thread form with an H3 thread limit. Consult the OSG Series 108 tool documentation to confirm compatibility with specific insert systems and machine setups.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or maintenance technician using a properly aligned tap handle or tapping head. Secure the workpiece firmly before tapping and apply appropriate cutting fluid for the material being machined. When tapping blind holes, use the bottoming chamfer to maximize thread engagement depth without forcing the tap against the hole bottom. Inspect the tap for wear or damage before each use and replace if cutting edges appear dull or chipped.\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 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\u003eHelix Angle\u003c\/strong\u003e: 50 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\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: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface Finish\u003c\/strong\u003e: elektraLUBE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 108\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.07 pounds\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: 8011202\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51741346267442,"sku":"8011202","price":54.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f541c5b50766f210a2b3af85ef43e39a.jpg?v=1788830916","url":"https:\/\/voomisupply.com\/products\/osg-8011202-spiral-flute-sti-tap-1-4-20-unc-hss","provider":"Voomi Supply","version":"1.0","type":"link"}