{"product_id":"osg-1757001-spiral-point-tap-4-40-unc-plug-2-flute","title":"Osg 1757001 Spiral Point Tap 4-40 Unc Plug 2 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1757001 is a spiral point tap designed for cutting 4-40 UNC internal threads in a wide range of demanding materials. Built from powdered metal and finished with a steam oxide coating, this plug-chamfer tap drives chips forward ahead of the cut, reducing clogging in through-hole applications. It carries an H2 thread limit and is rated for Class 2B and 3B fits, making it suitable for standard production threading where close tolerance control is required. With an overall length of 1.874 inches and a shank diameter of 0.141 inches, it fits standard tap holders used in machine and hand tapping setups. Licensed machinists, toolroom technicians, and maintenance mechanics are the primary users.\u003c\/p\u003e\u003cp\u003eThe OSG 1757001 is suited for through-hole threading operations in ferrous and exotic materials, including hardened steel, stainless steel, high-nickel alloy, titanium, alloy steel, and die steel. The plug chamfer makes it appropriate for through-holes where a partial-thread lead-in is acceptable. It is well matched to production environments where spiral point geometry and steam oxide lubricity help extend tool life in tough-to-machine alloys.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSpiral point geometry pushes chips ahead of the tap, keeping the flutes clear in through-hole applications\u003c\/li\u003e\n\u003cli\u003ePowdered metal construction provides consistent hardness and wear resistance across the full tool body\u003c\/li\u003e\n\u003cli\u003eSteam oxide coating reduces friction and helps retain cutting fluid at the tool-work interface\u003c\/li\u003e\n\u003cli\u003eH2 thread limit supports Class 2B and 3B fit requirements common in production threading\u003c\/li\u003e\n\u003cli\u003eRight-hand thread direction, 2-flute design suited for 4-40 UNC thread form\u003c\/li\u003e\n\u003cli\u003eNo coolant-through feature — designed for external flood or manual lubrication\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eRated for use in hardened steel, stainless steel, high-nickel alloy, titanium, alloy steel, and die steel. Produces 4-40 UNC threads to Class 2B and 3B fit standards per OSG Series 312.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall in a properly sized tap holder or tapping chuck; do not use a worn or loose holder as it can cause tap breakage at this small diameter. Ensure the workpiece and spindle are properly aligned before engaging the tap. Apply cutting fluid rated for the workpiece material, particularly when threading stainless steel or high-nickel alloys. Remove the tap carefully when reversing — 4-40 taps are small in cross-section and susceptible to breakage under side load.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2B and 3B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H2\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: Powdered Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Steam Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.874 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.33 inches (9\/16 inches nominal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.141 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Hardened Steel, Stainless Steel, High-Nickel Alloy, Titanium, Alloy Steel, Die Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 312\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 1757001\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51755641864498,"sku":"1757001","price":51.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0fbfb6e231daef3091f7ccd0a7781f0e.jpg?v=1788957468","url":"https:\/\/voomisupply.com\/products\/osg-1757001-spiral-point-tap-4-40-unc-plug-2-flute","provider":"Voomi Supply","version":"1.0","type":"link"}