{"product_id":"guhring-9039920222250-spiral-point-tap-7-8-9-unc-tin-hss","title":"Guhring 9039920222250 Spiral Point Tap 7\/8-9 Unc Tin Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe GUHRING 9039920222250 is a spiral point tap designed for through-hole threading in a wide range of ferrous materials. Manufactured from High-Speed Steel-E-PM (powder metallurgy HSS) and coated with titanium nitride (TiN), it delivers extended tool life and thermal resistance under production threading conditions. The tap is configured with 4 flutes, a plug chamfer, and a right-hand thread direction. It cuts a 7\/8-9 UNC thread profile to a 2B class of fit with a thread limit of H6\/H7. Overall length is 5.512 inches and thread length is 2.625 inches. Machinists, tool-and-die technicians, and maintenance mechanics use this tap in CNC machining centers, drill presses, and manual tapping operations.\u003c\/p\u003e\n\u003cp\u003eThis tap is suited for through-hole threading applications in steel, stainless steel, hardened steel, and chilled cast iron. The spiral point geometry pushes chips ahead of the tap and down through the hole, making it well matched to through-hole work where chip evacuation is straightforward. The plug chamfer provides a gradual thread lead-in, distributing cutting load across several threads. It is part of the GUHRING Series 3992 and is appropriate for both job-shop and production environments where consistent 7\/8-9 UNC thread quality is required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-Speed Steel-E-PM construction for improved hardness and wear resistance compared to conventional HSS\u003c\/li\u003e\n  \u003cli\u003eTiN coating reduces friction and extends tool life in ferrous materials\u003c\/li\u003e\n  \u003cli\u003eSpiral point geometry pushes chips forward through the hole for clean through-hole threading\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer distributes cutting load gradually for smooth thread engagement\u003c\/li\u003e\n  \u003cli\u003e4-flute design provides strength and chip control at 7\/8-9 thread size\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut, H6\/H7 thread limit, 2B class of fit for standard UNC tolerances\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eRated for threading in steel, stainless steel, hardened steel, and chilled cast iron. Designed as a through-hole threading tap for 7\/8-9 UNC applications. Not rated for coolant-through use.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or maintenance technicians using a tapping head, CNC rigid tapping cycle, or manual tap wrench. Power down and lock out any machine before changing tooling. Ensure the drilled hole is the correct tap-drill diameter for 7\/8-9 UNC before tapping. Apply cutting fluid appropriate for the workpiece material to reduce tool wear and improve thread finish.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 7\/8-9 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreads per Inch\u003c\/strong\u003e: 9\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Pitch\u003c\/strong\u003e: 0.1111 inches\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: H6\/H7\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: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Through-Hole Threading\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.512 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 2.625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.697 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel-E-PM (Powder Metallurgy HSS)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiN (Titanium Nitride)\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: 3992\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: 9039920222250\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51730378096946,"sku":"9039920222250","price":151.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/26984840b38552a0ac4391a9bfb5d630_ac1d8870-05c4-4492-8088-23bf70f080a3.jpg?v=1788716368","url":"https:\/\/voomisupply.com\/products\/guhring-9039920222250-spiral-point-tap-7-8-9-unc-tin-hss","provider":"Voomi Supply","version":"1.0","type":"link"}