Quick Coupler Identification Guide
Quick Coupler Identification Guide
There are hundreds sizes and styles of quick couplers available, many with very similar and often confusing names. We've made this helpful guide to ensure you're getting exactly what you need, so let's jump right in.
There are three factors in determining what quick coupler you need:
- Body style
- Body size
- Thread size.
By taking a few measurements you'll easily be able to identify exactly what quick couplers you're looking for.
What style of quick couplers do I need?
Click here to view our quick coupler identification chart. You can print out this identification chart to match up the the outlines of the male couplers.
What body size of coupler do I need?
View our Body Size Coupler Chart, to see the dimensions of male flat face, ISO-B, ISO-A, and agricultural style couplers.
What thread size do I need?
This article will go through the steps of how to identify thread sizes to help you determine the correct size thread you need for your application.
How to Identify Thread Sizes
POSTED ON BY TONY KOTULA
01
Jun
Jun
This article will go through the steps of how to identify thread sizes to help you determine the correct size thread you need for your application.
Measure the diameter of the thread
The first step to identify thread sizes of your components is measuring the diameter. You will need a caliper to do this. If you are measuring the male half of the coupling (external thread) make sure you use the bottom clamps of the caliper, and if you are measuring the female half of the coupling (internal thread) use the top clamps of the caliper to get the right measure.
These measurements will be part of the data you need to match with the information in the selection charts, but keep in mind that your measurement may not give you the exact number appearing on the chart. This can because of manufacturing tolerance or wear, but do not worry, usually the difference is minimal and you just have to choose the closest number from the selection chart.
Popular threads found in the most common fittings
National Pipe Thread (NPT): the special characteristic of this style of thread that is going to help you identify it is the presence of an inverted 30° seat in the female half and an 30° internal chamfer in the male half.
| Male Thread O.D. (in) | Female thread I.D (in) | |||||
| Male Thread O.D. (in) | Female thread I.D (in) | |||||
| Male Thread O.D. (in) | Female thread I.D (in) | |||||
| Male Thread O.D. (in) | Female thread I.D (in) | |||||
| 1⁄4 | -4 | 9⁄16 – 18 | 9⁄16 | 0.56 | 17⁄32 | 0.51 |
| 3⁄8 | -6 | 11⁄16 – 16 | 11⁄16 | 0.69 | 5⁄8 | 0.63 |
| 1⁄2 | -8 | 13⁄16 – 16 | 13⁄16 | 0.82 | 3⁄4 | 0.75 |
| 5⁄8 | -10 | 1 – 14 | 1 | 1.00 | 15⁄16 | 0.93 |
| 3⁄4 | -12 | 1 3⁄16 – 12 | 1 3⁄16 | 1.19 | 1 1⁄8 | 1.11 |
| 1 | -16 | 1 7⁄16 – 12 | 1 7⁄16 | 1.44 | 1 3⁄4 | 1.36 |
| 1 1⁄4 | -20 | 1 11⁄16 – 12 | 1 11⁄16 | 1.69 | 1 5⁄8 | 1.61 |
| 1 1⁄2 | -24 | 2-12 | 2 | 2.00 | 1 15⁄16 | 1.92 |
Final considerations
There are other numbers that can be found on the selection charts such as dash numbers and the nominal size. If you already know the style of your fitting and one of this number it is enough to select the one you need quickly and easily. However, as the name itself says, these are only nominal (name) expressions to represent the fitting. If you are not sure, the safest way to proceed is following the steps presented to you in this article.