{"product_id":"guhring-9019790079380-straight-flute-tap-5-16-18-unc","title":"Guhring 9019790079380 Straight Flute Tap 5\/16-18 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe GUHRING 9019790079380 is a straight flute tap designed for cutting internal threads in both blind hole and through-hole applications. Built from cobalt high-speed steel with an oxide finish, this tap handles demanding materials including gray cast iron, malleable iron, and spheroidal iron. It cuts a 5\/16-18 UNC right-hand thread to a 2B class of fit with a thread limit of H4\/H5. The modified bottoming chamfer allows threading close to the bottom of blind holes without sacrificing thread quality. With 4 flutes and a 90 mm overall length, it is suited for production and maintenance machining environments where consistent thread form is required.\u003c\/p\u003e\n\u003cp\u003eThis tap is used in machine shop and maintenance settings where UNC internal threads are required in ferrous materials. The modified bottoming chamfer makes it effective in blind hole applications where full thread depth near the bottom is necessary, while also performing in through-hole threading. With a shank diameter of 8 mm and a square length of 6.20 mm, it fits standard tap holders and machine spindles used in CNC and manual tapping operations. It is part of the GUHRING Series 1979 straight flute tap line.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCobalt high-speed steel construction for improved wear resistance in ferrous and abrasive materials\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer for threading close to the base of blind holes\u003c\/li\u003e\n  \u003cli\u003e4 straight flutes for efficient chip evacuation in through-hole and blind hole applications\u003c\/li\u003e\n  \u003cli\u003eOxide finish reduces friction and improves chip flow during tapping\u003c\/li\u003e\n  \u003cli\u003e2B class of fit with H4\/H5 thread limit for standard UNC tolerance requirements\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread direction, compatible with standard tapping equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for blind hole and through-hole threading in gray cast iron, malleable iron, and spheroidal iron. Fits standard 8 mm shank tap holders and machine spindle adapters used with manual and CNC tapping equipment.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tap should be installed by a machinist or tooling technician using a properly sized tap holder matched to the 8 mm shank diameter. Ensure the workpiece is securely fixtured before beginning the tapping cycle and that cutting fluid appropriate for ferrous materials is applied. For blind hole applications, set depth stops carefully to avoid bottoming the tap under torque. Follow shop safety procedures and machine manufacturer guidelines when setting spindle speed and feed rate.\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\u003eThreads per Inch\u003c\/strong\u003e: 18\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: 2B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H4\/H5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\u003c\/strong\u003e: Modified Bottoming\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 90 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 8 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Length\u003c\/strong\u003e: 6.20 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cobalt High-Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide\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: Gray Cast Iron, Malleable Iron, Spheroidal Iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 1979\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241600\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.001 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: 9019790079380\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51731059441970,"sku":"9019790079380","price":46.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/86a6eb7b1736529ff268253eda689fa1.jpg?v=1788726393","url":"https:\/\/voomisupply.com\/products\/guhring-9019790079380-straight-flute-tap-5-16-18-unc","provider":"Voomi Supply","version":"1.0","type":"link"}