Originally Posted by alien
If it's going on the heat stick, it needs to be male.
The amperage ratings are primarily guidelines to how much current a device can take before it starts to suffer from excessive heat. An additional issue you have is that the ambient temperature is high because the inlet is connected to a hot element. That is good reason to want to exceed the usual safety specifications rather than skimp on them.
If it gets hot to the touch or shows signs of heat damage then you know you have a problem.
This is correct. A more direct way of saying it is that you are choosing components that are underrated for your application, which is not the most prudent way to proceed. It may work, but why take the chance?
You can look at the Neutrik Powercon 20a. They have a "power in" chassis mount and a "power out" cord connector. Or you could search on "NEMA 5-20 inlet"
For your plug, you should have a NEMA 5-20 plug fed from a NEMA 5-20 GFCI.
You should be using 12awg copper in your cord to the heat stick, and in your wiring from a 20a circuit breaker in panel to the 20a GFCI outlet.
None of these components are difficult to obtain.