{"product_id":"osg-1170102-straight-flute-tap-1-4-20-unc-hss-plug","title":"Osg 1170102 Straight Flute Tap 1\/4-20 Unc Hss Plug","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1170102 is a straight flute tap designed for cutting 1\/4-20 UNC internal threads in a wide range of ferrous and non-ferrous materials. Built from high-speed steel (HSS), this tap features a plug chamfer with 3 flutes, making it well-suited for through-hole and blind-hole applications where chips can be pushed ahead or cleared from the cut zone. It carries a 3B class of fit and an H3 thread limit, providing the tolerance control required for standard fastener fits in production and maintenance environments. The overall length is 2.5 inches with a 1-inch thread length. Right-hand thread direction. Machinists, toolroom technicians, and maintenance mechanics are the primary users.\u003c\/p\u003e\u003cp\u003eThis tap is intended for tapping operations in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The plug chamfer style  -  typically 3 to 5 threads of lead  -  makes it a versatile choice for starting in a hole that has been drilled to the correct tap drill size. It is appropriate for both manual hand-tapping and machine tapping setups in job shop, production, and field maintenance contexts. The OSG Series 103 designation identifies the product line within the OSG tap catalog.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/4-20 UNC right-hand thread, 3B class of fit with H3 thread limit for standard tolerance fastener applications\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction provides durability across a broad range of workpiece materials\u003c\/li\u003e\n\u003cli\u003e3-flute straight flute geometry suitable for through-hole and blind-hole tapping\u003c\/li\u003e\n\u003cli\u003ePlug chamfer (approximately 3-5 thread lead) allows easy starting and consistent thread engagement\u003c\/li\u003e\n\u003cli\u003eCompatible with aluminum, cast iron, low-, medium-, and high-carbon steel workpieces\u003c\/li\u003e\n\u003cli\u003eNo coolant-through requirement  -  compatible with flood, mist, or dry tapping setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in any machine or hand-tapping application requiring a 1\/4-20 UNC thread form. Fits standard tap holders and collets sized for 1\/4-20 taps. Suitable for aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel per OSG material application data.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eEnsure the workpiece is drilled to the correct tap drill diameter for 1\/4-20 UNC before starting. Secure the tap in a properly aligned tap holder or tap wrench to prevent thread misalignment and tap breakage. Apply appropriate cutting fluid for the workpiece material  -  cutting oil for steels, light oil or kerosene for aluminum. Reverse the tap periodically during hand tapping to break and clear chips, especially in blind holes.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20 UNC\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: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Style\u003c\/strong\u003e: Plug\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\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\u003eThread Length\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 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: 103\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\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: 1170102\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51740686811442,"sku":"1170102","price":26.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5fd85c0f7bdc37879bc097d029f62492.jpg?v=1788826722","url":"https:\/\/voomisupply.com\/products\/osg-1170102-straight-flute-tap-1-4-20-unc-hss-plug","provider":"Voomi Supply","version":"1.0","type":"link"}