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IEC 60297-3-101 Ed. 1.0 b:2004
"Mechanical structures for electronic equipment - Dimensions of mechanical structures of the 482,6 mm (19 in) series - Part 3-101: Subracks and associated plug-in units"
IEC 60297-3-101:2004 Covers the basic dimensional relationship of a modular range of subracks and associated plug-in units in compliance with the IEC 60297 series. Specifies dimensions which will ensure dimensional interchangeability of subracks and associated plug-in units.
International Electrotechnical Commission [iec]