M20 Metric Thread Dimensions and Pitch
Below are the key dimensions for M20 metric threads: pitch, tap drill and clearance drill according to ISO 724:2023.
M20 Coarse (standard) |
|---|
| M20 Pitch: 2.5mm |
| M20 Tap Drill: 17.5mm |
| M20 Clearance Drill: 22mm |
M20 Metric Thread
Explore our M20 Metric Thread Page, your indispensable tool for quick measurements on M20 metric threads. We've curated a wide-ranging library of data for all the standard metric threads you'll implement in your components, focusing on key measurements like thread pitch, tap drill, and clearance drill. It's an all-encompassing resource for professionals and hobbyists in need of accurate and reliable information.
M20 Coarse Pitch Dimensions
| Nominal Size | d=D | p | r | d2=D2 | d3 | D1 | h3 | H1 | Tap Drill |
|---|---|---|---|---|---|---|---|---|---|
| M20 | 20 | 2.5 | 0.361 | 18.376 | 16.933 | 17.294 | 1.534 | 1.353 | 17.5 |
M20 Fine Pitch Dimensions
All dimensions stated in are mm (millimetre)
ISO Metric Thread profile
Major Diameter
The Major Diameter is the largest diameter on the thread and is measured from the thread crest to crest (peak of the thread).
Pitch
This is the distance (mm) from one thread to the next, this can be measured from tip to tip or groove to groove. Pitch can also be defined as TPI, which stands for threads per inch.
Minor Diameter
Minor Diameter is the smallest diameter on the thread and is measured from the thread root to root (Bottom of the thread).
Thread Angle
The angle between the thread faces. 60 degrees in the example above.
Right-Hand Thread
The thread will assemble when rotated clockwise. "righty tighty lefty loosely"
Left-Hand Thread
The thread will assemble when rotated counter-clockwise.
Frequently asked questions
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