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Specifications of International Thread Standards

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

Thread SizeMajor Diameter
mm
Tapping
Drill Size
mm
Pitch
mm
E 5.55.54.91.0
E 1010.08.81.81
E 1414.012.52.82
E 1616.014.72.50
E 1818.017.03.00
E 2727.024.53.62
E 3333.030.84.23
E 4040.036.36.35
Edison Thread