{"product_id":"osg-1752101-spiral-flute-tap-5-40-unc-modified-bottoming","title":"Osg 1752101 Spiral Flute Tap 5-40 Unc Modified Bottoming","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 1752101 is a spiral flute tap designed for cutting right-hand internal threads to a 5-40 UNC specification in demanding materials. It features a modified bottoming chamfer, which allows threading closer to the bottom of a blind hole than a standard plug tap. Built from powdered metal and finished with a steam oxide coating, the 1752101 provides improved lubricity and corrosion resistance during tapping operations. With 2 flutes and a 15-degree right-hand helix angle, it efficiently evacuates chips upward, making it well suited for through-hole and shallow blind-hole applications. The tap holds an H2 thread limit and a 2B\/3B class of fit, meeting common tolerance requirements for precision threaded assemblies.\u003c\/p\u003e\u003cp\u003eThis tap is intended for use in a range of difficult-to-machine materials including alloy steel, stainless steel, hardened steel, titanium, and high-nickel alloys. It is sized for small-fastener work typical in aerospace, medical device, instrumentation, and precision mechanical assembly applications. A licensed machinist or toolroom technician would typically install and operate this tap using a tapping head, CNC machining center, or manual tap wrench. Coolant-through is not supported on this tool.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eModified bottoming chamfer for threading close to the bottom of blind holes\u003c\/li\u003e\n\u003cli\u003eSpiral flute geometry with 15-degree right-hand helix angle for upward chip evacuation\u003c\/li\u003e\n\u003cli\u003ePowdered metal construction for increased wear resistance in tough alloys\u003c\/li\u003e\n\u003cli\u003eSteam oxide coating reduces friction and improves tool life in dry or minimally lubricated tapping\u003c\/li\u003e\n\u003cli\u003eH2 thread limit with 2B\/3B class of fit for standard precision tolerance requirements\u003c\/li\u003e\n\u003cli\u003eRight-hand thread direction, 5-40 UNC, 40 threads per inch\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for tapping 5-40 UNC threads in alloy steel, stainless steel, hardened steel, titanium, and high-nickel alloy workpieces. Compatible with standard tap holders and chucks sized for a 0.141-inch shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap should be installed and operated by a qualified machinist or toolroom professional familiar with small-diameter tapping procedures. Always ensure the workpiece is securely fixtured and the spindle or tap wrench is properly aligned before beginning the threading operation. Use an appropriate cutting fluid or tapping compound for the workpiece material to extend tool life and maintain thread quality. Do not exceed the recommended speed range for the workpiece material and tap size, and never reverse a broken tap without first relieving cutting pressure.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5-40\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: 40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\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: 15 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\/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\/Finish\u003c\/strong\u003e: Steam Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Alloy Steel, Stainless Steel, Hardened Steel, Titanium, High-Nickel Alloy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.938 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.21 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.141 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 0.634 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 0.1875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.11 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: 313\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: 1752101\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51748845289778,"sku":"1752101","price":66.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2a919ca79e01f031cd8f7f813828b12f_3c4f394a-3b95-41af-b8f2-4663c9bcfdef.jpg?v=1788899455","url":"https:\/\/voomisupply.com\/products\/osg-1752101-spiral-flute-tap-5-40-unc-modified-bottoming","provider":"Voomi Supply","version":"1.0","type":"link"}