Also here is the spec data sheet of that thermostat..
I have worked with that style of thermostat.
It does open and close at a temperature that is set when manufactured.
It has an internal concave/convex bi-metal disc meaning two different metals fused together with a slight depression/dome.
Uses two different types of metal, that expand/contract at different rates when temperature changes, causing disc to alternate which side is concave/convex.
When convex on side with small white plastic shaft electrical contacts are pushed open.
Transition is fast preventing contacts arcing.
Specifications are sometimes printed on black plastic or white ceramic body of switch.
Example:
L135-15C
First charter on left (L)
L = limit switch (open on rise)
F = fan switch (close on rise)
Adjacent set of numbers (135)
Upper temperature trip
Then spacer (-).
Set of numbers right side of spacer (15)
Differential for lower temperature trip, in this example 135-15 = 120 degrees.
Right side letter (C)
F = Fahrenheit
C = Celcius
If spacer and numbers to right of spacer are omitted, then like a fuse is not intended to reset on temperature drop.
In this example.
When temperature rises to 135 degrees celcius contacts go open.
When temperature drops to 120 degrees celcius contacts close.
I am guessing you might want about F110-20F.