{"product_id":"osg-1755405-spiral-flute-tap-m4x0-70-tin-vanadium-hss","title":"Osg 1755405 Spiral Flute Tap M4x0.70 Tin Vanadium Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1755405 is a spiral flute tap designed for cutting internal M4x0.70 metric coarse threads in a range of ferrous materials. It features three right-hand flutes at a 45-degree helix angle, which evacuate chips upward out of the hole — the standard approach for blind-hole tapping in tough materials. The modified bottoming chamfer allows threading closer to the bottom of a blind hole than a plug or taper style. A titanium nitride (TiN) coating reduces friction and extends tool life. The tap is ground from vanadium high-speed steel (HSS-V) and holds a 6H class of fit, the standard tolerance for general-purpose metric threads. Overall length is 2.125 inches with a 0.75-inch thread length.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for machine or hand tapping operations in stainless steel, high-carbon steel, low-carbon steel, and medium-carbon steel. The spiral flute geometry makes it particularly effective in blind-hole applications where chip clearance is a concern. It is used in machining, tool and die, maintenance and repair, and production threading operations where M4x0.70 internal threads are required to a 6H tolerance. The Series 343 designation indicates OSG's TiN-coated vanadium HSS spiral flute line.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e45-degree right-hand helix evacuates chips upward, ideal for blind-hole tapping\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer threads closer to the base of blind holes than plug-style taps\u003c\/li\u003e\n  \u003cli\u003eTiN coating reduces friction and extends cutting life in ferrous materials\u003c\/li\u003e\n  \u003cli\u003eVanadium high-speed steel substrate provides toughness and wear resistance\u003c\/li\u003e\n  \u003cli\u003e6H class of fit meets standard metric thread tolerance for general fastening applications\u003c\/li\u003e\n  \u003cli\u003eD4 thread limit for consistent fit across production runs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for M4x0.70 metric coarse blind-hole tapping in stainless steel, high-carbon steel, low-carbon steel, and medium-carbon steel. Part of the OSG Series 343 TiN-coated vanadium HSS spiral flute tap line.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap is installed and operated by machinists, tool and die makers, or maintenance technicians using a tapping machine, CNC machining center, or manual tap wrench. Always ensure the pilot hole is drilled to the correct diameter for M4x0.70 before tapping. Secure the workpiece and align the tap perpendicular to the hole surface to prevent tap breakage. Use an appropriate cutting fluid for the workpiece material to extend tool life and maintain thread quality.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: M4x0.70\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: Metric\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\u003eClass of Fit\u003c\/strong\u003e: 6H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: D4\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\u003eOverall Length\u003c\/strong\u003e: 2.125 inches (53.98 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.75 inches (19.05 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 4.2672 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 19.1 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 3.3274 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 6.35 mm\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: Titanium Nitride (TiN)\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\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 343\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.015 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: 1755405\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51749407392050,"sku":"1755405","price":57.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0580fe2b3e98b817b0f496723edcb47f_b8802ee2-d7f3-4046-91eb-8f8b6471899f.jpg?v=1788905686","url":"https:\/\/voomisupply.com\/products\/osg-1755405-spiral-flute-tap-m4x0-70-tin-vanadium-hss","provider":"Voomi Supply","version":"1.0","type":"link"}