{"product_id":"osg-1722008-spiral-flute-tap-4-40-unc-vanadium-hss","title":"Osg 1722008 Spiral Flute Tap 4-40 Unc Vanadium Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1722008 is a spiral flute tap designed for cutting 4-40 UNC internal threads in a range of ferrous materials. Built from vanadium high-speed steel and finished with a TiCN (titanium carbonitride) coating, this tap delivers improved wear resistance and lubricity compared to uncoated HSS tools. It features a modified bottoming chamfer for threading closer to the bottom of blind holes. With a 45-degree helix angle and three right-hand flutes, the tap efficiently evacuates chips upward out of the hole during the threading operation. Installed by machinists and precision fabricators, this tap is suited for production and maintenance work where thread quality and tool life in harder steels matter.\u003c\/p\u003e\n\u003cp\u003eThe OSG 1722008 is intended for threading operations in stainless steel, high-carbon steel, low-carbon steel, and medium-carbon steel workpieces. Its modified bottoming chamfer makes it a practical choice for blind-hole applications where thread engagement close to the hole bottom is required. The 4-40 UNC thread form is common in small-fastener assemblies found in electronics enclosures, precision instruments, and light mechanical assemblies. This tap is suitable for both CNC tapping centers and manual tapping operations using a tap wrench or tapping arm.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e4-40 UNC thread form with 40 threads per inch for small-fastener applications\u003c\/li\u003e\n  \u003cli\u003eVanadium high-speed steel construction provides increased hardness and toughness over standard M2 HSS\u003c\/li\u003e\n  \u003cli\u003eTiCN coating improves surface hardness and reduces friction against stainless and carbon steels\u003c\/li\u003e\n  \u003cli\u003e45-degree right-hand spiral flutes promote upward chip evacuation in blind holes\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer allows thread cutting close to the bottom of blind holes\u003c\/li\u003e\n  \u003cli\u003eH3 thread limit for close-tolerance thread fits in production environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for cutting 4-40 UNC threads in stainless steel, high-carbon steel, low-carbon steel, and medium-carbon steel. Part of the OSG EXOTAP VA3 series.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap is installed by machinists and tool-and-die professionals using a tapping chuck, CNC rigid tap holder, or manual tap wrench. Always use the recommended tap drill size for 4-40 UNC threads and verify drill depth before tapping blind holes. Apply a suitable cutting fluid for the workpiece material, particularly when threading stainless steel, to reduce heat buildup and extend tool life. Do not reverse the tap under power without confirming the machine is set for rigid tapping or a floating holder is in use.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40\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: 40\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\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\u003eFlute Direction\u003c\/strong\u003e: Right Hand\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: TiCN\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: 1.875 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.197 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.141 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.1875 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.11 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: EXOTAP VA3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.011 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: 1722008\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51753163915570,"sku":"1722008","price":63.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b0d0ff9cdb200f92763cd6924291ef38.jpg?v=1788933410","url":"https:\/\/voomisupply.com\/products\/osg-1722008-spiral-flute-tap-4-40-unc-vanadium-hss","provider":"Voomi Supply","version":"1.0","type":"link"}