Go gauges for caps E26, E26/50x39, E26/51x39 & E26d, 7006-27D-3

go gauges for caps E26, E26/50x39, E26/51x39 & E26d, 7006-27D-3 

Purpose: 

To check the maximum dimensions of the screw thread and dimension T1 minimum of E26, E26/50x39, E26/51x39 or E26d 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 touch surface X. When the lamp is removed from the gauge, at least two full turns shall be required to disengage the threads.