I have a barstool that has lost several examples of the screw pictured below, and I do not have calipers to measure it precisely. The screw is pictured atop a U.S. quarter coin.
Since the condition of the screw is imperfect, I should mention that I think this is an example of an internal hex screw (I am new to this nomenclature).
EDIT 2023.09.06: I must thank everybody for the interest and advice and also apologize for the poor quality of the pictures I posted.
I know that I needn't stick to the exact same type of screw, but I thought that some people might still be curious what it is. I found some calipers at work, and the following (not-to-scale) diagram shows my measurements to three significant digits.
I did some novice-level research (search engine), and judging by examples I found, I suspect the following describe some qualitative features.
- Pan head
- Hex socket
- Black oxide finish
|Equivalent metric measurement (to 3 significant digits)
Based on the finish and the examples I found online, I suspect that the 6.02 mm measurement should be interpreted as 6 mm and that this is an M6 screw. Combining this with what I saw available online, I suspect that this is an M6 x 12 mm screw.