{"product_id":"kennametal-4131291-hand-tap-1-4-20-unc-bottoming-hss","title":"Kennametal 4131291 Hand Tap 1\/4-20 Unc Bottoming Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4131291 is a straight-flute hand tap designed for cutting internal threads in through-holes and blind holes where a bottoming chamfer is required. Built from high-speed steel with a bright, uncoated finish, this tap cuts 1\/4-20 UNC right-hand threads to a 3B class of fit with an H3 thread limit, making it suitable for applications that require close thread tolerances. The straight flute geometry is well matched to short-chipping materials. With a 2.5-inch overall length and a 1-inch thread length, this tap is sized for general-purpose hand tapping operations in a variety of shop and field settings. Installation is performed by a machinist or skilled tradesperson using a standard tap wrench.\u003c\/p\u003e\u003cp\u003eThis tap is used in metalworking applications involving cast iron and non-ferrous metals, including aluminum, brass, and copper alloys. The bottoming chamfer  -  typically 1 to 2 threads of taper  -  allows threading to the bottom of a blind hole after a plug or taper tap has already started the thread. Typical applications include repair tapping, fixture work, and production threading where full thread depth in a blind hole is required. It carries the Series 5305 and 5303 designations from KENNAMETAL.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBottoming chamfer for threading to the bottom of blind holes\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction for durability across cast iron and non-ferrous metals\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish suited to general-purpose tapping\u003c\/li\u003e\n\u003cli\u003e3-flute straight flute geometry for short-chipping materials\u003c\/li\u003e\n\u003cli\u003e3B class of fit with H3 thread limit for close-tolerance threads\u003c\/li\u003e\n\u003cli\u003eRight-hand, 1\/4-20 UNC thread form\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eCompatible with cast iron and non-ferrous metals per manufacturer specification. Intended for use in applications requiring 1\/4-20 UNC internal threads to a 3B class of fit. Part of KENNAMETAL Series 5305 and 5303.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eHand taps of this type are installed using a standard tap wrench and require a properly sized tap drill hole prior to use. For blind holes, a taper or plug tap should be used first to start the thread before switching to this bottoming tap. Apply cutting fluid appropriate to the workpiece material to extend tool life and improve thread quality. Follow standard shop safety practices and secure the workpiece before tapping.\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\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\u003eChamfer\u003c\/strong\u003e: Bottoming\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\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 \/ Finish\u003c\/strong\u003e: Bright \/ Uncoated\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\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Cast Iron, Non-Ferrous Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 5305, 5303\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.4 pounds\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: 4131291\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51739841593650,"sku":"4131291","price":32.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3c59d4a42f58848efa54b83c2378d448.jpg?v=1788819492","url":"https:\/\/voomisupply.com\/products\/kennametal-4131291-hand-tap-1-4-20-unc-bottoming-hss","provider":"Voomi Supply","version":"1.0","type":"link"}