M4 Metric Thread Dimensions and Pitch
Below are the key dimensions for M4 metric threads: pitch, tap drill and clearance drill according to ISO 724:2023.
M4 Coarse (standard)
Explore our M4 Metric Thread Page, your go-to hub for quick assessments of M4 metric threads. We've curated a broad spectrum of data for all standard metric threads you'll require for your parts, highlighting important measurements like thread pitch, tap drill, and clearance drill. It's an all-inclusive resource for engineers, machinists, and hobbyists in search of reliable, precise information.
M4 Coarse Pitch Dimensions
M4 Fine Pitch Dimensions
All dimensions stated in are mm (millimetre)
ISO Metric Thread profile
The Major Diameter is the largest diameter on the thread and is measured from the thread crest to crest (peak of the thread).
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 is the smallest diameter on the thread and is measured from the thread root to root (Bottom of the thread).
The angle between the thread faces. 60 degrees in the example above.
The thread will assemble when rotated clockwise. "righty tighty lefty loosely"
The thread will assemble when rotated counter-clockwise.