What size drill bit do I need for a 1 inch NPT tap?

NPT Tap Drill Chart

Tap Size Drill Size Tap and Drill Set
1″ NPT Tap 1-5/32″ Drill Bit 1″ NPT Tap and Drill Set
1-1/4″ NPT Tap 1-1/2″ Drill Bit Only Sold Individually
1-1/2″ NPT Tap 1-47/64″ Drill Bit Only Sold Individually
2″ NPT Tap 2-7/32″ Drill Bit Only Sold Individually

What is a PG thread size?

What does this size PG29 call out? The PG stands for Panzer-Gewinde . This is a German type thread. The Main difference on this vs NPT and Metric is that the depth of the thread is smaller but has a larger flank angle, which makes it have a wider pitch along with a straight thread.

What is the NPT thread?

The best known and most widely used connection where the pipe thread provides both the mechanical joint and the hydraulic seal is the American National Pipe Tapered Thread, or NPT. NPT has a tapered male and female thread which seals with Teflon tape or jointing compound.

What is meant by PG gland?

PG cable gland full form is called Stahlpanzerrohrgewinde or Panzergewinde cable gland, which is Germany thread size type call. PG is one of the main thread types of the cable glands, the PG cable gland thread sizes(dimensions) are ranging from PG7 to PG63.

How is NPT thread calculated?

The taper rate for all NPT threads is 1 inch of diameter in 16 inches of length ( 3⁄4 inch per foot or 62.5 millimeters per meter) measured by the change of diameter (of the pipe thread) over distance of thread. The angle between the taper and the center axis of the pipe is tan−1( 1⁄32) ≈ 1.7833° ≈ 1° 47′.

Is BSP the same as NPT?

NPT and BSP threads are not interchangeable due to the differences in thread forms. NPT threads are pointed in the peaks and valleys, where BSPs are rounded. Most notably, the NPT thread angle is 60 degrees versus the BSP 55-degree angle.

How do I know if thread is NPT?

To determine the NPT size, with a caliper, measure the diameter of the 2nd or 3rd thread on your pipe, fitting or valve as shown below. Find the caliper measurement in the chart and cross reference the nominal NPT pipe size. Don’t get confused, the actual measurement is not the same as the NPT pipe size.