Will this give accurate readings of ambient air temperature?

Yes, but you would have to have the tip off of a table or whatever that might be a different temperature and hold it in your hand by the dial. All of these are able to be calibrated. Put in a cup of ice and set the dial to 33°.

What country is this made in?

The company Supco is located in Bronx, NY at Supco.com, had it awhile, still works well if that helps.

can this be calibrated by nut on back for rotating dial?

I believe so. There is a nut on the back, but I haven't had to recalibrate mine yet.

What is the diameter of the stem? I've got a 3/16" hole that I'd like it to fit into

The one I have measures .150", so it should easily fit into a 3/16" hole which is .1875".

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Supco ST02 Stainless Steel Pocket Dial Thermometer, 5" Stem, 1" Dial, 0 to 220 Degrees F

Supco ST02 Stainless Steel Pocket Dial Thermometer, 5" Stem, 1" Dial, 0 to 220 Degrees F

Product ID: 203721883

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Details

Brand
Supco
Special feature
Waterproof
Colour
Silver
Age range (description)
Adult
Outer material
Stainless
Display type
Analog

💧Waterproof stainless steel

📏5" precision stem

🔄Recalibration for accuracy

Description

🌡️ Pocket Power: Precision Temps, Anytime, Anywhere

VERSATILE PRO TOOL - Perfect for refrigerators, freezers, and air conditioners—your go-to temp gauge.
STAY ACCURATE ALWAYS - Easy recalibration adjustment keeps your readings spot-on over time.
BUILT TO LAST RESIST - Durable stainless steel housing with waterproof design for reliable everyday use.
EFFORTLESS READABILITY - Large 1-inch dial with bold numerals for quick, no-hassle monitoring.
PRECISION AT YOUR FINGERTIPS - 5-inch stem ensures accurate temperature readings deep inside appliances.

The Supco ST02 is a compact, stainless steel analog dial thermometer featuring a 5-inch stem and a 1-inch dial. Waterproof and built for durability, it offers a temperature range from 0 to 220°F, ideal for monitoring refrigerators, freezers, and air conditioners. Its recalibration feature ensures long-term accuracy, making it a reliable tool for professionals and home managers alike.

Specifications

Manufacturer	Supco
Part number	ST02
Item Weight	13.6 g
Item model number	ST02
Size	1 inches Diameter
Colour	Silver
Material	PC_(Polycarbonate), PE_(Polyethylene)
Power source type	Manual
Item Package Quantity	1
Temperature Range	0/220 Degrees Fahrenheit
Cutting Diameter	1 Inches
Display style	Analog
Special Features	Waterproof
Batteries included?	No
Batteries Required?	No
Item diameter	1 Inches

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