Specifications of International Thread Standards

DIN 40450 has been deleted without replacement. Nevertheless still cover glasses and caps using this thread are still produced. Two examples of companies still producing under this standard are RZB (Rudolf Zimmernann, Bamberg GmbH) and Ferraz Shawmut (Lindner). Even the screw joint with the self-sealing grommet is using Pg.

Thread SizeCover Glass
mm
Cap
mm
Pitch
mm
Thread Length
Cover Glass mm
Thread Length
Cap min. mm
Glasg 74.573.5 - 74.569.5 - 72.57.519.0 - 21.022.0
Glasg 84.583.5 - 84.578.0 - 81.07.521.0 - 23.024.0
Glasg 9998.0 - 99.092.5 - 95.57.524.0 - 26.027.0
Glasg 123.5122.5 - 123.5117.0 - 120.07.527.0 - 29.030.0
Glasg 158156.0 - 158.0149.0 - 153.512.037.0 - 40.042.0
Glasg 188186.0 - 188.0179.0 - 183.512.042.0 - 45.047.0
Glass Thread