Thread StandardsDIN 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 Size | Cover Glass mm |
Cap mm |
Pitch mm |
Thread Length Cover Glass mm |
Thread Length Cap min. mm |
| Glasg 74.5 | 73.5 - 74.5 | 69.5 - 72.5 | 7.5 | 19.0 - 21.0 | 22.0 |
| Glasg 84.5 | 83.5 - 84.5 | 78.0 - 81.0 | 7.5 | 21.0 - 23.0 | 24.0 |
| Glasg 99 | 98.0 - 99.0 | 92.5 - 95.5 | 7.5 | 24.0 - 26.0 | 27.0 |
| Glasg 123.5 | 122.5 - 123.5 | 117.0 - 120.0 | 7.5 | 27.0 - 29.0 | 30.0 |
| Glasg 158 | 156.0 - 158.0 | 149.0 - 153.5 | 12.0 | 37.0 - 40.0 | 42.0 |
| Glasg 188 | 186.0 - 188.0 | 179.0 - 183.5 | 12.0 | 42.0 - 45.0 | 47.0 |
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