E Thread DIN 40400
Edison Thread

E Thread DIN 40400
Edison Thread

The name Edison thread for the socket of lamps traces back to Thomas Alva Edison.

Thread Size	Major Diameter mm	Tapping Drill Size mm	Pitch mm
E 5,5	5,5	4,9	1,0
E 10	10,0	8,8	1,81
E 14	14,0	12,5	2,82
E 16	16,0	14,7	2,50
E 18	18,0	17,0	3,00
E 27	27,0	24,5	3,62
E 33	33,0	30,8	4,23
E 40	40,0	36,3	6,35