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.

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Go gauge for caps on finished lamps E12, 7006-27H-1

Purpose:

To check the maximum dimensions of the screw thread and dimension T1 minimum of E12 caps on finished lamps.

Testing:

When the cap on a finished lamp has been screwed into the gauge as far as it will go, the centre contact shall be co-planar with, or project beyond surface X. When the lamp is being removed from the gauge, at least two full turns shall be required to disengage the threads.

This gauge shall be used only in conjunction with the gauge specified on sheet 7006-27J.