{"product_id":"guhring-9039430079380-thread-forming-tap-5-16-18-unc","title":"Guhring 9039430079380 Thread Forming Tap 5\/16-18 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe GUHRING 9039430079380 is a thread forming tap designed for cold-forming internal threads in ductile materials without cutting or removing chips. Built from cobalt high-speed steel (HSS-E-CO) and finished with a TiCN coating, this tap generates threads by displacing material rather than cutting it, producing stronger thread forms with a burnished surface finish. It is configured for a 5\/16-18 UNC thread profile with a 2BX class of fit and a modified bottoming chamfer of 2 to 3 threads, making it well suited for threading blind holes close to the bottom. Overall length is 2.721 inches, thread length is 0.709 inches, and tapping depth reaches 1.378 inches.\u003c\/p\u003e\n\u003cp\u003eThis tap is used in production and maintenance machining environments where chip-free threading is required in blind or through-hole applications. Its five oil grooves support external lubrication during the forming process. The H8\/H9 thread limit and Series 3943 designation make it a standard selection for shops working with steel, stainless steel, cast iron, and non-ferrous metals. It is appropriate for CNC tapping centers, rigid tapping setups, and manual tapping in controlled production environments where consistent thread quality is critical.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e5\/16-18 UNC thread profile with 2BX class of fit for standard fastener thread tolerance\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer (2 to 3 threads) allows threading close to the bottom of blind holes\u003c\/li\u003e\n  \u003cli\u003eCobalt HSS-E-CO construction provides heat and wear resistance in hard and abrasive materials\u003c\/li\u003e\n  \u003cli\u003eTiCN coating reduces friction and extends tool life in steel and stainless steel applications\u003c\/li\u003e\n  \u003cli\u003eFive oil grooves support external lubricant delivery during thread forming\u003c\/li\u003e\n  \u003cli\u003eChip-free forming action produces stronger threads than cut tapping in ductile materials\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eRated for use in steel, stainless steel, cast iron, and non-ferrous metals (material application codes P, M, K, N). Suitable for both blind hole and through-hole threading operations. Thread limit H8\/H9, Series 3943.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread forming taps require a properly sized forming tap drill — the recommended hole diameter is larger than a standard cut tap drill for the same thread size; consult a thread forming drill chart before drilling. Use cutting or tapping oil appropriate for the workpiece material, ensuring adequate lubrication through the oil grooves to prevent galling. Power down or de-energize any machine spindle before loading or removing the tap from the holder. Follow shop safety protocols and machine manufacturer guidelines when setting tapping speed and torque limits for rigid tapping cycles.\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\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 to 3 threads\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: 0.709 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\u003eOil Grooves\u003c\/strong\u003e: 5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute-to-Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cobalt High-Speed Steel (HSS-E-CO)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Blind Hole Threading, Through-Hole Threading\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: 3943\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: 9039430079380\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51738715357490,"sku":"9039430079380","price":74.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/cf960c1015f1a474ada0fa87e3ab7d84.jpg?v=1788803312","url":"https:\/\/voomisupply.com\/products\/guhring-9039430079380-thread-forming-tap-5-16-18-unc","provider":"Voomi Supply","version":"1.0","type":"link"}