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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 Tapping Pitch
mm Drill Size mm
  mm  
E 5.5 5.5 4.9 1.00
E 10 10 8.8 1.81
E 14 14 12.5 2.82
E 16 16 14.7 2.50
E 18 18 17.0 3.00
E 27 27 24.5 3.62
E 33 33 30.8 4.23
E 40 40 36.3 6.35
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