Specifications of historical Thread Standards

Thread for mechanical and optical instruments. Very common since approx. 1850. Hamann was a machine manufacturer for lathes in Berlin.
The flank angle ranges from 50° to 76°.

Major Diameter
mm
Pitch
mm
TPIThread Angle
13.9076 1/250°
23.0928 3/450°
32.7399 3/1150°
41.9531350°
51.54616 8/750°
61.2702050°
71.1542250°
80.9762650°
90.87329 1/1350°
100.7053650°
110.6354064°
12tf.0.4615550°
12fl.0.4615576°
130.2888850°
Hamann Patronen Thread