Electric lighting fittings DIN 40450

Glass Thread DIN 40450 (Glasg)

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 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