Letter drill bit sizes: the sizes are indicated in letters, from size A (the smallest) to size Z (the largest).

The taper tap features a smooth diameter transition that allows for a less aggressive cutting action. The durable taps included in these sets are ideal for use with a tap wrench or drill, providing excellent results for a variety of applications. As well as being able to drill holes are then tap put threads we can also CNC punch and cut threads on our Trumpf 3000 CNC punch press. RS PRO hand tap sets are manufactured from HSS (high speed steel), offering a durable and reliable selection of tools and are available in a range of thread sizes from M3 to M12.The first recorded use of taps in metalworking is placed sometime in the 18th century, while the British engineer and industrialist Joseph Clement popularised the tool in the mid-19th century. So, if we wanted to drill a hole for our example bolt, we would need to use a drill that is smaller than 4 mm. Second and plug taps have a shorter taper and more threads and are often used to create and re-cut threads at a faster rate. People would need a drill size chart and tap size chart to determine the proper tap drill for a certain thread size or proper tap for an existing hole. We know we can rely on them for a fast response to new inquiries and that they can assist us with the design, development and efficient manufacture of fabricated parts.

The taper tap is only used in certain situations such as when the material is very hard or the hole is too small. As a consequence the development of taps corresponded to this standardisation ensuring enhanced compatibility. RS PRO straight flute hand tap are manufactured from HSS (high speed steel), offering a durable and reliable selection of tools suitable for a range of thread sizes.Hand tap sets are hand tools designed for thread cutting in holes into various materials such as steel allowing you to create a smooth and precise thread for bolts and other materials. If the taper needs to go first, the intermediate tap follows second and the thread is finished with the bottoming tap.