Console PSU plugs dimensions

[haynor666]

What are exact dimensions are for PSU plug for Sega Megadrive 1/Mega CD, Megadrive 2/32X, NEC PC Engine (orange), PC Engine CD ROM addon (again orange version), Famicom 2AV, SNES USA/NTSC (very close to Dell PSU plug)?

I have some 4.8mm 1.7mm conversion plugs for Sega Megadrive 2/32X and those fits actually. Some sources however claim only 4.0mm 1.7mm.

The same problem I have with Megadrive 1/Mega CD plug. Converters are usually 2,1 to 2,5 auto fit but I would prefer to know exact size as some DC splitters are not auto regulated. Famicom 2AV and PC Engine seems to be also using 5,5/2,5 plugs. SNES USA is probably using very close to 7mm/5mm with pin 1mm.