{"product_id":"kennametal-1544531-hand-tap-1-4-20-unc-bottoming-tin-hss","title":"Kennametal 1544531 Hand Tap 1\/4-20 Unc Bottoming Tin Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 1544531 is a 1\/4-20 UNC straight flute hand tap designed for bottoming applications in ferrous metals. Built from high-speed steel with a titanium nitride (TiN) coating, it delivers extended tool life and reduced friction during threading operations. The 4-flute straight flute geometry provides chip control suited to through-hole and blind-hole bottoming work. With an overall length of 2.5 inches and a thread length of 1 inch, this tap is sized for standard 1\/4-20 threading tasks. The H3 thread limit and Class 3B fit designation make it appropriate for close-tolerance threaded assemblies. Machinists and toolroom technicians install it by hand or with a tap wrench in bench and machine setups.\u003c\/p\u003e\u003cp\u003eThis tap is intended for threading operations in cast iron, stainless steel, and steel workpieces. Its bottoming chamfer allows thread cutting to the bottom of blind holes, making it a finishing tap used after a taper or plug tap has started the thread. Right-hand thread direction matches standard UNC fastener conventions. The TiN coating improves performance in harder ferrous materials where uncoated high-speed steel taps wear prematurely.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/4-20 UNC thread form, right-hand direction, Class 3B fit\u003c\/li\u003e\n\u003cli\u003eBottoming chamfer for threading to the bottom of blind holes\u003c\/li\u003e\n\u003cli\u003eTiN coating reduces wear and extends tool life in ferrous materials\u003c\/li\u003e\n\u003cli\u003eH3 thread limit for close-tolerance 3B class threaded assemblies\u003c\/li\u003e\n\u003cli\u003e4-flute straight flute design for chip control in cast iron, stainless steel, and steel\u003c\/li\u003e\n\u003cli\u003eOverall length of 2.5 inches with a 1-inch thread length\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eRated for use in cast iron, stainless steel, and steel. Compatible with standard 1\/4-20 UNC tap holders and tap wrenches. Designed as an OEM-style replacement or direct toolroom addition for 1\/4-20 bottoming hand tap applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eHand taps are installed by machinists or toolroom technicians using a tap wrench or tapping fixture. Secure the workpiece before tapping and ensure the starting hole is drilled to the correct tap drill size for 1\/4-20 UNC threads. Apply cutting fluid appropriate for the workpiece material, particularly when tapping stainless steel. Do not force the tap; back off periodically to break chips and prevent tap breakage in blind holes.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChamfer Type\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass of Fit\u003c\/strong\u003e: 3B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Straight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Titanium Nitride (TiN)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.255 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Cast Iron, Stainless Steel, Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: KENNAMETAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1544531\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51737417220402,"sku":"1544531","price":34.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/82d23041256d8b767374d1be0f67feb1.jpg?v=1788788279","url":"https:\/\/voomisupply.com\/products\/kennametal-1544531-hand-tap-1-4-20-unc-bottoming-tin-hss","provider":"Voomi Supply","version":"1.0","type":"link"}