{"product_id":"osg-1206402-spiral-point-tap-4-40-unc-hss","title":"Osg 1206402 Spiral Point Tap 4-40 Unc Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1206402 is a spiral point plug tap designed for threading 4-40 UNC internal threads in through-hole applications. Made from high-speed steel (HSS) with an elektraLUBE coating, this tap is built for controlled chip ejection forward through the hole, reducing the risk of chip packing and thread damage. It features 2 flutes, a plug chamfer, H2 thread limit, and a 2B\/3B class of fit, making it suitable for standard tolerance threaded holes requiring reliable engagement across a 9\/16 inch thread length. Machinists and toolroom professionals use this tap in both manual and machine tapping operations.\u003c\/p\u003e\u003cp\u003eThe 1206402 is rated for use across a broad range of materials including aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. It is well-suited for production and maintenance environments where 4-40 UNC threads are required in through-hole configurations. The right-hand thread direction is standard for conventional tapping setups on mills, drill presses, and tapping arms. This tap does not support coolant-through delivery.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSpiral point geometry ejects chips forward, ideal for through-hole tapping\u003c\/li\u003e\n\u003cli\u003eelektraLUBE coating reduces friction and extends tool life across varied workpiece materials\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction handles a wide range of ferrous and non-ferrous materials including hardened steel\u003c\/li\u003e\n\u003cli\u003ePlug chamfer provides a gradual thread start for smooth entry\u003c\/li\u003e\n\u003cli\u003eH2 thread limit and 2B\/3B class of fit for standard tolerance threaded connections\u003c\/li\u003e\n\u003cli\u003e9\/16 inch thread length suits typical through-hole depths at this thread size\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for cutting 4-40 UNC internal threads in through-hole applications across aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel workpieces. Compatible with standard 4-40 UNC tap holders and collet-style tapping chucks accepting the appropriate shank size for OSG Series 105 taps.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap should be installed by a qualified machinist familiar with thread form requirements and tap holder specifications. Ensure the workpiece is properly secured and the spindle or tapping arm is aligned true to the hole axis before engaging the tap. Use appropriate cutting fluid for the workpiece material even though the elektraLUBE coating provides lubrication — additional fluid extends tool life in steel applications. Inspect the tap for wear or chipping before each use; a damaged tap can strip threads or break in the hole.\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 \/ 3B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 9\/16 inches\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: High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: elektraLUBE\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: Aluminum, Cast Aluminum, Cast Iron, Low-Carbon Steel, Medium-Carbon Steel, High-Carbon Steel, Hardened Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 105\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.015 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: 1206402\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51749681627442,"sku":"1206402","price":31.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6c730ddbde4cd81c8869beca2478ed3c.jpg?v=1788909138","url":"https:\/\/voomisupply.com\/products\/osg-1206402-spiral-point-tap-4-40-unc-hss","provider":"Voomi Supply","version":"1.0","type":"link"}