Spiral Flute Tap: 1/4-28, UNJF, 3 Flute, Modified Bottoming, 3B Class of Fit, HSS-E-PM, ACN Finish MPN:10001154

Norton's High-Speed Steel Spiral Flute Tap is engineered for precise and efficient drilling of holes into a variety of materials including steel, aluminum, brass, cast iron and plastics. The modified bottoming feature ensures that it produces clean threaded holes by reducing damage on the inner surface of the workpiece while improving gripping power during tapping operations. Its three-flute design minimizes clogging and chatter, promoting faster cutting speeds, longer life, and better surface finishes. The UNJF (Universal National Coarse Thread) standard is ideal for a range of industrial applications in sectors such as automotive, machinery, electronic and precision equipment manufacturing. Additionally, the 3B class of fit ensures that it meets American National Standard Institute (ANSI) standards for general purpose threads, while its HSS-E-PM material offers excellent hardness and wear resistance for a durable performance that won't let users down even under demanding conditions.