110 volt outlet 160 degrees. Is that safe?

Check the back of the device to see what it's rated at; toaster ovens are notoriously power-hungry.

Ok, well; think about it;
If it's a 15amp circuit, then the device can draw 1800 watts.
That's like a space heater/window air-conditioner, on high. All my space heaters etc, when running WFO, have warm cords; and the smaller the gauge, the warmer the cords.
Plus, the further the 14ga wiring goes out from the panel, the warmer the cords run.
But see, my Daddy didn't raise no dumbass,
I put multiple small heaters on separate circuits, out on the long lines, and reserve the big 1500s, for short 12 gauge lines.
And so, the same thinking applies to "toaster ovens" ........
When I wired my kitchen, I ran only 12 ga lines and every receptacle is split and running on opposite busses, with no more than two duplex receptacles per line. So then, if I wanted to, every receptacle could deliver 240 volts and maybe 40 amps. My house will never catch fire from faulty house wiring.

Ok so check the back of the device and see what it's rated for, lol.
Toaster ovens are notoriously power hungry.