{"product_id":"osg-1101400-straight-flute-bottoming-tap-3-8-16-unc-hss","title":"Osg 1101400 Straight Flute Bottoming Tap 3\/8-16 Unc Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1101400 is a straight flute bottoming tap designed for threading operations in a wide range of ferrous and non-ferrous metals. Built from high-speed steel with a bright uncoated finish, this tap cuts a 3\/8-16 UNC right-hand thread and is engineered to thread close to the bottom of a blind hole. It carries an H1 thread limit, which holds tight tolerance on the finished thread. The 4-flute straight flute design channels chips back out of the hole, making it well suited to through-hole applications and shallow blind bores where chip evacuation is straightforward. Overall length is 2-15\/16 inches with a thread length of 1-1\/4 inches.\u003c\/p\u003e\u003cp\u003eThis tap is used in machine shop, maintenance, and field repair work wherever a 3\/8-16 UNC thread must be cut into a pre-drilled hole. Material applications include aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The bottoming chamfer style allows threading to within a few thread pitches of the bottom of a blind hole, making it the correct choice when a plug or taper tap has already started the hole and full-depth thread engagement is required. It is appropriate for use in manual tap handles, tapping heads, and CNC tapping operations.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBottoming chamfer for threading close to the bottom of blind holes\u003c\/li\u003e\n\u003cli\u003eH1 thread limit for controlled tolerance on 3\/8-16 UNC threads\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction for durability across steel, cast iron, and aluminum workpieces\u003c\/li\u003e\n\u003cli\u003e4-flute straight flute geometry for efficient chip removal in through-hole and shallow blind-hole work\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish compatible with cutting oils and water-soluble coolants\u003c\/li\u003e\n\u003cli\u003eRight-hand thread direction, no coolant-through  -  compatible with standard toolholding\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for cutting 3\/8-16 UNC right-hand threads in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. Part of the OSG Series 101 straight flute tap line.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap is installed and used by machinists, maintenance technicians, and trade professionals performing threaded-hole repair or fabrication. Always use the correct tap drill size for 3\/8-16 UNC before starting the tap, and apply an appropriate cutting fluid for the workpiece material. Secure the tap in a proper tap handle or machine holder and maintain axial alignment to avoid tap breakage. For blind holes, use a plug or taper tap to start the thread before finishing with this bottoming tap.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/8-16 UNC\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: 16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-15\/16 inches (2.937 inches decimal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1-1\/4 inches (0.937 inches decimal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.413 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.381 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.4375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.286 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.075 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: 1101400\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51742996726066,"sku":"1101400","price":29.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e6fad03d55a3b14178c38c803e6f8c50.jpg?v=1788841367","url":"https:\/\/voomisupply.com\/products\/osg-1101400-straight-flute-bottoming-tap-3-8-16-unc-hss","provider":"Voomi Supply","version":"1.0","type":"link"}