{"product_id":"walter-prototyp-7427639-thread-forming-tap-1-4-20-unc-tin","title":"Walter-prototyp 7427639 Thread Forming Tap 1\/4-20 Unc Tin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe WALTER-PROTOTYP 7427639 is a right-hand thread forming tap in the TC410 Advance series, designed to cut 1\/4-20 UNC internal threads without producing chips. It is manufactured from High-Speed Steel-E (WY80AD grade) and coated with Titanium Nitride (TiN) for extended tool life and reduced friction. With an overall length of 3.1496 inches (80.00 mm) and a thread length of 0.5906 inches (15.00 mm), this tap suits blind-hole and through-hole threading operations. Licensed HVAC, plumbing, maintenance, and metalworking trades rely on this tool for precise thread forming in a range of metals. Class of fit is 2BX with a modified bottoming chamfer of 2 to 3 threads.\u003c\/p\u003e\n\u003cp\u003eThis tap is built for productive threading in steel, stainless steel, cast iron, non-ferrous metals, and superalloys, corresponding to material application codes P, M, K, N, and S. The modified bottoming (semi-bottoming) chamfer makes it effective in blind holes where thread engagement close to the bottom is required. The 3.5xD flute-by-diameter ratio and five oil grooves support efficient forming without coolant-through capability. It is well suited for production machining environments and precision maintenance applications where thread quality and consistency are critical.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eThread size 1\/4-20 UNC, Class of Fit 2BX, right-hand thread direction\u003c\/li\u003e\n  \u003cli\u003eModified bottoming chamfer with 2 to 3 chamfered threads for blind-hole capability\u003c\/li\u003e\n  \u003cli\u003eHigh-Speed Steel-E construction with Titanium Nitride coating for wear resistance\u003c\/li\u003e\n  \u003cli\u003eFive oil grooves and 3.5xD flute-by-diameter ratio for controlled forming action\u003c\/li\u003e\n  \u003cli\u003eTapping depth of 1.1811 inches (30.00 mm); shank diameter 0.2756 inches (7.00 mm)\u003c\/li\u003e\n  \u003cli\u003eSuitable for blind-hole and through-hole threading in steel, stainless, cast iron, non-ferrous, and superalloy materials\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in steel, stainless steel, cast iron, non-ferrous metal, and superalloy workpieces requiring 1\/4-20 UNC internal threads; compatible with standard tap holders and chucks accepting a 0.2756-inch shank and 0.2165-inch square drive (5.50 mm square).\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread forming taps should be installed by machinists or qualified maintenance technicians using a tap holder matched to the shank and square dimensions. Ensure the machine spindle is fully stopped and locked out before changing tooling. Apply appropriate tapping fluid or cutting oil to the tap and workpiece prior to use, as coolant-through is not available on this tool. Follow the workpiece manufacturer and shop safety procedures for speeds and feeds when threading the specified material type.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20\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 Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer\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\u003eOverall Length\u003c\/strong\u003e: 3.1496 inches (80.00 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.5906 inches (15.00 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTapping Depth\u003c\/strong\u003e: 1.1811 inches (30.00 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.2756 inches (7.00 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquare Size\u003c\/strong\u003e: 0.2165 inches (5.50 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel-E\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: WY80AD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Titanium Nitride (TiN)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOil Grooves\u003c\/strong\u003e: 5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute By Diameter Ratio\u003c\/strong\u003e: 3.5xD\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: TC410 Advance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Steel; Stainless Steel; Cast Iron; Non-Ferrous Metal; Superalloy\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions (H x W x L)\u003c\/strong\u003e: 0.51 x 0.55 x 3.66 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 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: WALTER-PROTOTYP\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 7427639\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WALTER","offers":[{"title":"Default Title","offer_id":67909770576178,"sku":"7427639","price":114.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0bc28d63690a11b5e13279517549e08f_6b51ba41-18e0-4299-90f6-5cfece4bd1fc.jpg?v=1791191934","url":"https:\/\/voomisupply.com\/products\/walter-prototyp-7427639-thread-forming-tap-1-4-20-unc-tin","provider":"Voomi Supply","version":"1.0","type":"link"}