Technical drawing of the cross-section 55 degree flank angle

Model Engineer Thread

The Model Engineer thread is a British thread used in model making. It is not commercially used in this area, and screws or nuts with Model Engineer thread are not available for purchase. Therefore, metric threads are much more widespread in model building. The Model Engineer thread is mainly used for miniature versions of steam boilers on steam engines.

The Model Engineer thread is an inch thread with a 55° flank angle. The thread profile is based on the widely used British Whitworth thread, but the pitch in the Model Engineer thread is constant, varying only between 40 and 32 threads per inch.

The thread designation begins with the abbreviation ME, which stands for Model Engineer, followed by the external diameter in inches, e.g., ME 3/16″.

In the thread table for the Model Engineer thread, you will find all necessary measurements in inches and converted into the metric equivalent. Besides external diameter and pitch, the core hole diameter for the Model Engineer thread is also listed. We are happy to manufacture dies and taps for the Model Engineer thread as a custom order!

To the overview thread standards
Thread Identifier Zoll
Diameter outside inch
Diameter outside mm
Diameter Core hole mm
Gears per Inch
Pitch mm
Taps in our online-shop
Dies in our online-shop
ME 5/32″
5/32
3,969
3,155
40
0,635
ME 3/16″
3/16
4,763
3,949
40
0,635
ME 7/32″
7/32
5,556
4,743
40
0,635
ME 9/32″
9/32
7,144
6,127
32
0,794
ME 9/32″
9/32
7,144
6,330
40
0,635
ME 5/16″
5/16
7,938
6,920
32
0,794
ME 5/16″
5/16
7,938
7,124
40
0,635
ME 7/16″
7/16
11,113
10,096
32
0,794
ME 7/16″
7/16
11,113
10,300
40
0,635
ME 1/2″
1/2
12,700
11,683
32
0,794
ME 1/2″
1/2
12,700
11,887
40
0,635