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E39 No Go Gauges for Screw Threads of Lampholders 7006-26-4
The drawing is intended only to illustrate the essential dimensions of the gauge.
For details of screw thread of lampholders E39, see sheets 7005-24A respectively.
PURPOSE: To check the maximum minor diameter of the screw thread, dimenaion D1, of lampholders E39.
TESTING: The screw thread of the lampholder shall be assumed to be correct if the gauge does not enter by its own weight so far that the thread protrudes beyond surface T.
* For cetring purposes only
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