{"product_id":"osg-1747301-spiral-flute-tap-8-32-unc-modified-bottoming","title":"Osg 1747301 Spiral Flute Tap 8-32 Unc Modified Bottoming","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1747301 is a spiral flute tap designed for cutting 8-32 UNC internal threads in a range of ferrous materials. It features a 45-degree helix angle that evacuates chips upward during blind-hole tapping, reducing the risk of chip packing and tap breakage. Manufactured from vanadium high-speed steel with a steam oxide coating, it delivers added lubricity and corrosion resistance during cutting. The modified bottoming chamfer allows threading close to the bottom of a blind hole. With a 2B class of fit and H7 thread limit, it produces threads that meet standard fastener tolerances for general mechanical assembly work.\u003c\/p\u003e\u003cp\u003eThis tap is suited for production and maintenance tapping in stainless steel, high-carbon steel, low-carbon steel, and medium-carbon steel. The 8-32 UNC size is common in instrument panels, electronic enclosures, small structural brackets, and precision mechanical assemblies. The 3-flute spiral design performs well in both CNC tapping centers and hand-tapping operations where chip control in blind holes is a priority. It is sold individually and is appropriate for machine shops, maintenance facilities, and trade professionals working with small-diameter threaded fastener applications.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e45-degree right-hand helix angle for upward chip evacuation in blind holes\u003c\/li\u003e\n\u003cli\u003eModified bottoming chamfer for threading close to hole bottom\u003c\/li\u003e\n\u003cli\u003eVanadium high-speed steel construction for durability in ferrous materials\u003c\/li\u003e\n\u003cli\u003eSteam oxide coating improves lubricity and reduces galling\u003c\/li\u003e\n\u003cli\u003e2B class of fit with H7 thread limit for standard fastener tolerance compliance\u003c\/li\u003e\n\u003cli\u003eRight-hand thread cutting direction, 3 flutes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eRated for use in stainless steel, high-carbon steel, low-carbon steel, and medium-carbon steel. Designed for 8-32 UNC thread form per Series 303 specifications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a machinist or qualified technician familiar with tapping operations. Secure the workpiece fully before tapping and use an appropriate cutting fluid for the material being tapped. For machine tapping, verify spindle speed and feed rate are appropriate for the tap diameter and material hardness. Inspect the tap for wear or chipping before each use to avoid thread damage or breakage in the workpiece.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 8-32\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: 32\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\u003eFlute Direction\u003c\/strong\u003e: Right Hand\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: 2B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H7\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: Vanadium High-Speed Steel\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: 2.125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.252 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.168 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 0.168 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 0.752 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.131 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: 303\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: 1747301\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51732354072882,"sku":"1747301","price":43.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4ca17d5d10907681bb819a55c3eec5b9.jpg?v=1788741977","url":"https:\/\/voomisupply.com\/products\/osg-1747301-spiral-flute-tap-8-32-unc-modified-bottoming","provider":"Voomi Supply","version":"1.0","type":"link"}