IEC60061-3: 7006-53-1 Gauge for Finished Lamps Fitted with E40 Caps for Testing Protection Against Accidental Contact.
According to standard IEC 60061-3.
IEC60061-3: 7006-51A-2 Gauge for Caps on Finished Lamps for Testing Protect Against Accidental Contact During Insertion E27.
According to standard IEC 60061-3.