Npt Thread Chart Tap Drill Size In Mm
Introduction
When it comes to creating threads, there are different types of threads and sizes. One common type of thread is the National Pipe Thread (NPT), which is used for pipes and fittings. To create an NPT thread, you need to use a tap drill. In this article, we will discuss the NPT thread chart tap drill size in mm.
What is NPT?
National Pipe Thread (NPT) is a type of thread used for pipes and fittings. It is a tapered thread, which means the diameter of the thread decreases towards the end. The NPT thread is commonly used in the United States and Canada for low-pressure plumbing and air systems. NPT threads are also used in some other countries such as the United Kingdom, Australia, and New Zealand.
NPT Thread Sizes
The NPT thread comes in different sizes, ranging from 1/16 inch to 6 inches. The size of the NPT thread is determined by the nominal pipe size (NPS), which is the outer diameter of the pipe. For example, if the NPS of a pipe is 1 inch, the NPT thread size will be 1 inch. The NPT thread size is also referred to as the trade size.
NPT Tap Drill Size in mm
When creating an NPT thread, you need to use a tap drill to make the hole before tapping the thread. The tap drill size is determined by the size of the NPT thread. The tap drill size for NPT threads is different from the tap drill size for other types of threads such as metric and unified threads. The NPT tap drill size is measured in millimeters (mm).
NPT Tap Drill Size Chart in mm
The NPT tap drill size chart in mm can be found online or in a machinist handbook. The chart provides the tap drill size for each NPT thread size. For example, the tap drill size for a 1/4 inch NPT thread is 8.5 mm, while the tap drill size for a 1/2 inch NPT thread is 20.5 mm. It is important to use the correct tap drill size to ensure a proper thread fit.
Conclusion
In conclusion, the NPT thread chart tap drill size in mm is an important factor to consider when creating NPT threads. The correct tap drill size should be used to ensure a proper thread fit. The NPT thread size is determined by the nominal pipe size, and the tap drill size is determined by the NPT thread size. Machinist handbooks and online resources provide NPT tap drill size charts for easy reference.