{"product_id":"guhring-9039400079380-thread-forming-tap-5-16-18-unc","title":"Guhring 9039400079380 Thread Forming Tap 5\/16-18 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe GUHRING 9039400079380 is a thread forming tap designed for producing internal threads without cutting chips, reducing the risk of chip contamination in blind and through-hole applications. Built from High-Speed Steel-E-CO (cobalt-enhanced HSS) and coated with Titanium Nitride (TiN), this tap delivers extended tool life in demanding production environments. It is configured with a Modified Bottoming chamfer of 2-3 threads, making it well-suited for threading close to the bottom of blind holes. With a thread limit of H8\/H9 and a 2BX class of fit, it produces consistent, accurate threads at the tighter end of the tolerance range. HVAC, plumbing, and general manufacturing technicians use thread forming taps where chip-free threading is critical to assembly integrity.\u003c\/p\u003e\n\u003cp\u003eThis tap is part of GUHRING Series 3940 and is sized for 5\/16-18 UNC right-hand threads. It is engineered for use in steel, stainless steel, cast iron, and non-ferrous metals, covering a broad range of trade and industrial applications. The flute-by-diameter ratio of 3xD and five oil grooves support adequate lubrication during the forming process. It handles both blind-hole threading and through-hole threading, making it a versatile choice for fabrication shops, maintenance facilities, and production lines working in mixed material environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-Speed Steel-E-CO (cobalt) construction for increased hardness and heat resistance\u003c\/li\u003e\n  \u003cli\u003eTitanium Nitride (TiN) coating reduces friction and extends tool life\u003c\/li\u003e\n  \u003cli\u003eModified Bottoming chamfer (2-3 threads) enables threading close to blind hole bottoms\u003c\/li\u003e\n  \u003cli\u003e2BX class of fit with H8\/H9 thread limit for tight-tolerance thread production\u003c\/li\u003e\n  \u003cli\u003eFive oil grooves support consistent lubrication across the forming zone\u003c\/li\u003e\n  \u003cli\u003eSuitable for blind-hole and through-hole threading in steel, stainless steel, cast iron, and non-ferrous metals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in materials coded P (steel), M (stainless steel), K (cast iron), and N (non-ferrous metal). Suitable for 5\/16-18 UNC threaded assemblies requiring a 2BX class of fit in both blind-hole and through-hole configurations.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread forming taps are typically installed and operated by machinists and tool-and-die or maintenance technicians using a tapping machine, CNC machining center, or hand tap wrench. The workpiece must be secured and the correct tap drill size used for the specific material to maintain the proper thread engagement ratio. Always apply an appropriate tapping fluid or cutting oil to the oil grooves before and during use. Do not attempt to back the tap out under power if it becomes bound — disengage and back out manually to avoid breakage.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16-18 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 2BX\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H8\/H9\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Modified Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfered Threads\u003c\/strong\u003e: 2-3P\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.721 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.7087 inches (18.00 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTapping Depth\u003c\/strong\u003e: 1.378 inches (35.00 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.318 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.238 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOil Grooves\u003c\/strong\u003e: 5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel-E-CO (Cobalt HSS)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Titanium Nitride (TiN)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Non-Ferrous Metal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 3940\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: GUHRING\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 9039400079380\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51727125872946,"sku":"9039400079380","price":68.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d3ebd6229d2b6e9553f236949607bed3.jpg?v=1788673762","url":"https:\/\/voomisupply.com\/products\/guhring-9039400079380-thread-forming-tap-5-16-18-unc","provider":"Voomi Supply","version":"1.0","type":"link"}