IEC 60399 Revised
IEC 60399:1972
Standard sheets for barrel thread for E14 and E27 lampholders with shade holder ring
Gives limit dimensions of thread for metal or plastic and ceramic lampholders with shade holder rings made of metal or plastic. Dimensions for 'Go' and 'Not go' gauges for shade holder rings and for lampholders are also included.
CHFÂ 10.-
A more recent version of this publication exists:
IEC 60399:2004+AMD1:2008 CSV