M1.1 Metric Thread Dimensions and Pitch
Below are the key dimensions for M1.1 metric threads: pitch, tap drill and clearance drill according to ISO 724:2023.
M1.1 Coarse (standard) |
---|
M1.1 Pitch: 0.25mm |
M1.1 Tap Drill: 0.85mm |
M1.1 Clearance Drill: 1.3mm |

M1.1 Metric Thread

Immerse yourself in our M1.1 Metric Thread Page, a valuable repository for prompt measurements on M1.1 metric threads. We've created an exhaustive catalogue for all typical metric threads you'll employ in your parts, focusing on main dimensions such as thread pitch, tap drill, and clearance drill. It's a one-stop resource for engineers, machinists, and hobbyists looking for accurate and dependable information.
M1.1 Coarse Pitch Dimensions
Nominal Size | d=D | p | r | d2=D2 | d3 | D1 | h3 | H1 | Tap Drill |
---|---|---|---|---|---|---|---|---|---|
M1.1 | 1.1 | 0.25 | 0.036 | 0.938 | 0.793 | 0.829 | 0.153 | 0.135 | 0.85 |
M1.1 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
To speed up the quote process, try to follow the guidelines below during your request
The pitch for an M1.1 thread is 0.25 mm.
The tap drill for an M1.1 thread is 0.85 mm.
The clearance drill for an M1.1 thread is 1.3 mm.

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