EN
Technical drawing of the thread cross-section 60 degree flank angle

Ducommun Steinle thread

The Ducommun Steinle thread is a historical thread for mechanical and optical instruments, designed in 1873 by Heilmann-Ducommun & Steinle in Mulhouse, Alsace, then part of Germany (Mühlhausen). Today, the Ducommun Steinle thread is no longer in use.

The Ducommun Steinle thread is a metric thread, with all dimensions in mm. The flank angle is 60°.

The thread table for the Ducommun Steinle thread covers a wide range of dimensions from 3 mm to 80 mm. The table below includes information on the external diameter, pitch, and required core hole diameter for cutting a Ducommun Steinle thread. We can manufacture custom dies and taps for you upon request.

To the overview thread standards
Diameter outside mm
Diameter Core hole mm
Pitch mm
Taps in our online-shop
Dies in our online-shop
3,00
2,33
0,50
Link to the tap
Link to the thread cutting die
4,00
3,00
0,75
Link to the tap
Link to the thread cutting die
5,00
4,00
0,75
Link to the tap
Link to the thread cutting die
6,00
4,67
1,00
Link to the tap
Link to the thread cutting die
7,00
5,33
1,25
Link to the tap
Link to the thread cutting die
8,00
6,33
1,25
Link to the tap
Link to the thread cutting die
9,00
7,00
1,50
Link to the tap
Link to the thread cutting die
10,00
8,00
1,50
Link to the tap
Link to the thread cutting die
12,00
9,67
1,75
Link to the tap
Link to the thread cutting die
15,00
12,33
2,00
Link to the tap
Link to the thread cutting die
18,00
14,67
2,50
Link to the tap
Link to the thread cutting die
20,00
16,67
2,50
Link to the tap
Link to the thread cutting die
23,00
19,00
3,00
Link to the tap
Link to the thread cutting die
25,00
21,00
3,00
Link to the tap
Link to the thread cutting die
28,00
24,00
3,00
Link to the tap
Link to the thread cutting die
30,00
25,33
3,50
Link to the tap
Link to the thread cutting die
32,00
27,33
3,50
Link to the tap
Link to the thread cutting die
35,00
29,67
4,00
Link to the tap
Link to the thread cutting die
38,00
31,67
4,00
Link to the tap
Link to the thread cutting die
40,00
34,68
4,00
Link to the tap
Link to the thread cutting die
45,00
39,00
4,50
Link to the tap
Link to the thread cutting die
48,00
40,33
5,00
Link to the tap
Link to the thread cutting die
50,00
43,33
5,00
Link to the tap
Link to the thread cutting die
55,00
48,33
5,00
Link to the tap
Link to the thread cutting die
60,00
52,00
6,00
Link to the tap
Link to the thread cutting die
65,00
57,00
6,00
Link to the tap
Link to the thread cutting die
70,00
60,67
7,00
Link to the tap
Link to the thread cutting die
75,00
65,67
7,00
Link to the tap
Link to the thread cutting die
80,00
70,67
7,00
Link to the tap
Link to the thread cutting die