E12 Not go gauge for caps on finished lamps, 7006-28C-1

Not go gauge for caps on finished lamps E12, 7006-28C-1

Purpose:

To check the minimum outside (major) diameter of the screw thread, dimension d, of E12 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.