{"product_id":"osg-1762301-spiral-flute-tap-9-16-18-unf-modified-bottoming","title":"Osg 1762301 Spiral Flute Tap 9\/16-18 Unf Modified Bottoming","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1762301 is a spiral flute tap designed for cutting 9\/16-18 UNF internal threads in a range of ferrous materials. Built from vanadium high-speed steel (HSS) with a steam oxide coating, it delivers reliable wear resistance and lubricity in production and maintenance threading applications. The 45-degree helix angle drives chips up and out of the hole, making it well-suited for blind-hole tapping where chip evacuation is critical. The modified bottoming chamfer allows threading close to the bottom of a blind hole. This tap is sized at 3-19\/32 inches overall length with a thread length of 0.665 inches, and carries an H3 thread limit with a 3B class of fit for standard precision unified thread applications.\u003c\/p\u003e\n\u003cp\u003eThis tap is intended for use in stainless steel, high-carbon steel, low-carbon steel, and medium-carbon steel workpieces. It is a practical choice for machine shops, maintenance facilities, and field service operations requiring accurate UNF threads in blind or through holes. The spiral flute design makes it particularly effective in CNC and manual tapping machines where consistent chip management is needed. It is sold individually and fits standard tap holders sized for its 0.381-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e45-degree right-hand spiral flute for upward chip evacuation in blind holes\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer allows threading to near the bottom of a blind hole\u003c\/li\u003e\n  \u003cli\u003eVanadium high-speed steel construction for improved toughness and wear resistance\u003c\/li\u003e\n  \u003cli\u003eSteam oxide coating reduces friction and improves lubricity during cutting\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit, 3B class of fit for standard UNF tolerance applications\u003c\/li\u003e\n  \u003cli\u003eSeries 303 — 9\/16-18 UNF, compatible with standard tap holders for the shank size\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for threading 9\/16-18 UNF blind and through holes in stainless steel, high-carbon steel, low-carbon steel, and medium-carbon steel. Fits standard tap holders accepting a 0.381-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall and operate this tap using a properly sized tap holder or collet chuck rated for the shank diameter; use of an undersized or worn holder can cause tap breakage or thread inaccuracy. Always apply a cutting fluid appropriate for the workpiece material — sulfurized oil or water-soluble coolant is commonly used with HSS taps in steel. Ensure the workpiece is securely fixtured and the tap is aligned perpendicular to the hole before engaging. Follow shop safety practices and relevant machine guarding requirements when tapping on powered equipment.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 9\/16-18 UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 18\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: Modified Bottoming\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: 3B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Vanadium High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Steam Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Stainless Steel, High-Carbon Steel, Low-Carbon Steel, Medium-Carbon Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.594 inches (3-19\/32 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.665 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.381 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 0.429 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.252 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.322 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 303\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.147 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 4.25 x 0.75 x 0.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 1762301\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51755574264114,"sku":"1762301","price":132.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7e382f4f7268843fe655fba9aebc6655_86814ad6-521e-46a0-8be9-aa4e6a8e6a4b.jpg?v=1788956262","url":"https:\/\/voomisupply.com\/products\/osg-1762301-spiral-flute-tap-9-16-18-unf-modified-bottoming","provider":"Voomi Supply","version":"1.0","type":"link"}