>>9679171Most of the lines you see in OP list use 3mm pegs. 52toys' Megabox line has three AMTS mechs do use 5mm pegs but it is mixed in with 3mm pegs (i.e. 5mm for larger waist and thigh joints, 3mm for arms)
The current Super Sentai toyline
>>9652084 also uses peg joints, but I can't tell what diameter they are.