Purpose: To check the minimum outside(major) diameter of the screw thread, dimension d ,of E14 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.

"NOT GO" gauge for E14 caps on finished lamps(7006-28B-1