Metric Threads

The charts below gives the dimensions for Metric Coarse Thread and Metric Fine Threads.

The size of a metric fastener (screw, bolt, etc.) is generally specified as diameter, pitch and length, all in millimeters (mm). Metric fasteners are usually classified as either coarse or fine, referring to their thread pitch, although some sizes are available in an extra fine thread. Coarse is the most common metric thread and is assumed when pitch isn't specified.

Dimensions shown are in mm, if you wish to convert to Inches, please use our universal converter.