M1 Metric Thread Dimensions and Pitch
Below are the key dimensions for M1 metric threads: pitch, tap drill and clearance drill according to ISO 724:2023.
M1 Coarse (standard) |
|---|
| M1 Pitch: 0.25mm |
| M1 Tap Drill: 0.75mm |
| M1 Clearance Drill: 1.2mm |
M1 Metric Thread
Welcome to our M1 Metric Thread Page, the ultimate resource for swift measurements on M1 metric threads. This comprehensive database contains detailed information for all common metric threads you'll utilise in your components, covering key dimensions such as thread pitch, tap drill, and clearance drill. It serves as a one-stop-shop for engineers, machinists, and hobbyists seeking accurate and reliable information.
M1 Coarse Pitch Dimensions
| Nominal Size | d=D | p | r | d2=D2 | d3 | D1 | h3 | H1 | Tap Drill |
|---|---|---|---|---|---|---|---|---|---|
| M1 | 1 | 0.25 | 0.036 | 0.838 | 0.693 | 0.729 | 0.153 | 0.135 | 0.75 |
M1 Fine Pitch Dimensions
All dimensions stated in are mm (millimetre)
ISO Metric Thread profile
Glossary
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
What is the pitch of an M1 thread?
What is the tap drill for an M1 thread?
What size is a clearance hole for an M1 thread?
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