E40 No Go Gauge for Caps on Finished Lamps 7006-28D-1

IEC60061-3: 7006-28D-1 E40 No go gauge for Caps on Finished Lamps

Purpose:
To check the minimum outside (major) diameter of the screw thread, dimension d, of E40 caps on finished lamps.

Testing:
When the gauge is placed over the thread of the cap on a finished lamp, held cap uppermost, the centre contact shall not project beyond surface X.
Only the weight of the gauge itself shall be used in the test.