GlowShift 1/8 NPT Drill and Tap Kit

Product Information

The angle between the sides of the thread is 60° when measured with a line bisecting the angle, perpendicular to the center axis. Now, before drilling, mark the spot where you want your hole. That way, you know exactly where your drill is going, and you minimize any errors. Plus, it keeps everything looking neat!

NPT Threads - Taps and Drill Sizes - The Engineering ToolBox NPT Threads - Taps and Drill Sizes - The Engineering ToolBox

National Pipe Thread Taper or NPT threaded pipes and fittings are deployed in a variety of fields where transportation or containment of liquids, gases, steam, or hydraulic fluid is required. The NPT geometry allows internal and external thread surfaces to further engage when torque is applied to the thread assembly. This creates a fluid-tight seal. With NPT, as opposed to NPTF, the use of a sealing compound or tape is typically applied to the threads to complete the seal. Because of NPT’s mating and sealing capabilities, a practical knowledge of the NPT thread is a valuable addition to an engineer’s toolbox.

Utilizing the Hole Wizard Feature

These coatings can get a little pricey, but trust me; they’re worth it if you want to up your game. Create a Sketch on the Right Plane which intersects the helix created. On this sketch we will define the thread profile. To account for tolerance and precision during the fabrication of these threads, refer to guides such as this one, which explains how to use external and internal NPT thread gauges. These go-no-go gauges control quality of NPT threads during fabrication. Create another Sketch on the rear face of the thread and Extrude another circle equal to the outer diameter of the pipe to the third point on the reference sketch.

Model NPT Threads in Solidworks - Sparx Engineering How to Model NPT Threads in Solidworks - Sparx Engineering

Once we open up the Hole Wizard feature, select the Tapered Tap option in the Hole Type section. Set the standard to ANSI Inch, set Type to Tapered Tap Pipe Tap and in the hole specifications, select the desired size in inches. Create a Sketch on the new face of this extrusion and draw a Circle equal to the inner diameter of the pipe. The 1/8″ NPT tap’s diameter is not 0.125 inches, but based on the thread on the end of a 1/8-inch pipe, it’s approximately0.405 inchesin the “big” diameter.

Citation

National Pipe Thread Taper, commonly known just as NPT, is a U.S. standard for tapered threads used on threaded pipes and fittings. This standard is widely used all over North America. Pipe thread sizes are usually based on the inside diameter (ID) or flow size. The way to read an NPT size is the nominal inside diameter and the number of threads per inch. For example, if we have a 1/4-18 NPT, that means it is a 1/4 inch inside diameter and 18 threads per inch. If LH is added to the end, it means the pipe has a left-handed thread.