Originally Posted by Jammer
I've never seen one with the sideways terminal (that fits into the T) although it would be easy enough to make one up. But the terminal configuration doesn't improve the current handling ability, it's just a rarely used mechanism intended to make sure that an appliance that requires a 20 A circuit can't be plugged into a 15 A circuit.
I have one (30 amp RV female to 20 amp male) - got it off Amazon for a couple bucks last summer. I can't find it at the moment but I think they still have it.
1995 Airstream Classic 30' Excella 1000
2014 Ram 2500 Crew Cab with Cummins 6.7L Diesel
Sold but not forgotten: 1991 Airstream B190
Sold: 2006 F-250 6.0L Powerstroke Supercab