I am working on some low voltage, medium current circuits (5 V, 20 A), and the standard Pomona 4 mm patch cords (which are extremely convenient) have too much resistance to allows my circuits to operate well. I am building some alternative cords using 10 awg silicone cables which are great (about 3 mΩ instead of 20 mΩ), but I don't have a good 4 mm plug for them -- one that handles the wire thickness and also makes a neat and strong connection.
Any suggestions ? Are stackable plugs available ?