2009DIN EN 60399:2009-04 Barrel thread for lampholders with shade holder ring (IEC 60399:2004 + A1:2008); German version EN 60399:2004 + A1:2008 / Note: DIN EN 60399 (2005-04) remains valid alongside this standard until 2011-08-01.
2009DIN EN 60399:2009 Barrel thread for lampholders with shade holder ring (IEC 60399:2004 + A1:2008); German version EN 60399:2004 + A1:2008