No, not hot but the case is aluminium and may contact the underside of some HAT boards so an (electrical) insulating layer of some sort may be needed.
Plastic/phenolic/card...etc. Maybe even something as basic strips of electrical insulating tape.
Another option may be to include a 40 pin riser between the HAT and the Argon so lifting the HAT higher and out of possible contact with the case.
https://www.adafruit.com/product/4079
(watch the video demo on the Adafruit link ;-)
Plastic/phenolic/card...etc. Maybe even something as basic strips of electrical insulating tape.
Another option may be to include a 40 pin riser between the HAT and the Argon so lifting the HAT higher and out of possible contact with the case.
https://www.adafruit.com/product/4079
(watch the video demo on the Adafruit link ;-)
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bob
bob
