{"product_id":"osg-0138701-spiral-flute-tap-1-2-13-unc-bottoming-2b-vss","title":"Osg 0138701 Spiral Flute Tap 1\/2-13 Unc Bottoming 2B Vss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 0138701 is a spiral flute tap designed for cutting internal 1\/2-13 UNC threads in a bottoming configuration. It features a 45-degree helix angle that ejects chips upward out of the hole, making it well suited for blind-hole tapping operations. Constructed from vanadium high-speed steel and finished with a steam oxide coating, it provides improved lubricity and corrosion resistance during use. With a 2B class of fit and H5 thread limit, the tap produces threads within standard tolerance for general mechanical assemblies. The overall length is 3.375 inches with a shank diameter of 0.367 inches.\u003c\/p\u003e\u003cp\u003eThis tap is intended for use in ferrous materials including stainless steel, high-carbon steel, low-carbon steel, and medium-carbon steel. The bottoming chamfer allows threading to the bottom of a blind hole, which is a common requirement in close-tolerance mechanical work. It is appropriate for use in machine shop environments and by machinists, millwrights, and maintenance technicians working with 1\/2-13 UNC fastener applications.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e45-degree right-hand spiral flute geometry for efficient upward chip ejection in blind holes\u003c\/li\u003e\n\u003cli\u003eBottoming chamfer for threading to the base of blind holes\u003c\/li\u003e\n\u003cli\u003eVanadium high-speed steel construction for toughness in ferrous materials\u003c\/li\u003e\n\u003cli\u003eSteam oxide coating improves lubricity and reduces galling\u003c\/li\u003e\n\u003cli\u003eH5 thread limit with 2B class of fit for standard tolerance internal threads\u003c\/li\u003e\n\u003cli\u003eNo coolant-through design; suitable for use with cutting fluid applied externally\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for tapping 1\/2-13 UNC internal threads in stainless steel, high-carbon steel, low-carbon steel, and medium-carbon steel workpieces. Compatible with standard 1\/2-13 UNC bottoming tap applications in machine, maintenance, and production environments.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tap should be installed in a rigid tapping holder or CNC tapping chuck rated for the shank diameter. Ensure the workpiece is securely fixtured and the drill press or machining center is powered down before changing tooling. Apply a suitable cutting fluid or tapping compound appropriate for the workpiece material prior to use. Follow shop safety protocols and ANSI B94.9 standards for tap selection and application.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-13\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\u003c\/strong\u003e: 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: H5\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\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread 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\u003eThreads per Inch\u003c\/strong\u003e: 13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.614 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 1.933 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.367 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: 0.275 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: 0.105 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: 0138701\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51733621145906,"sku":"0138701","price":86.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8610fad5678d11b238187baeaa1df36d.jpg?v=1788757015","url":"https:\/\/voomisupply.com\/products\/osg-0138701-spiral-flute-tap-1-2-13-unc-bottoming-2b-vss","provider":"Voomi Supply","version":"1.0","type":"link"}