Westward 5PXH2 Pipe and Conduit Thread Tap High-speed steel taps boast excellent wear resistance, meaning these taps stay sharp longer, ideal for general-purpose tapping applications. They effectively work on a range of materials, making them a go-to tool for many situations. Thread Size / 1/4 inch-18 Thread Standard / NPT Tap Material / High Speed Steel Tap Finish / Bright (Uncoated) Thread Length / 1-1/16 inch Overall Length / 2-7/16 inch 75% Thread Drill Size / 0.4375 inch Class of Fit / 3B Number of Flutes / 4 Primary Material Application / All Materials Thread Direction / Right Hand Coolant Fed / Non-Coolant Through Drill Bit Size / 7/16 inch Features / Cutting Internal Pipe Threads Flute Type / Straight Material Grade - Machining / M2 Measurement System / Fractional Inch Shank Dia. / 9/16 inch Shank Length / 1-3/8 inch Shank Type - Machining / Straight Square Size / 0.4210 inch Standards / ASME Tap Chamfer / Semi-Bottoming Tap Style / Pipe Tap Thread Size / 1/4 inch-18 Threads per Inch / 18