He is right. A fine thread would be 1/2-20.
A, the half inch bolt has 13 rows of thread in one inch.
general use coarse thread bolt is correct. 1/2 inch bolt. 13 threads per inch.
automotive service technician development
There is not much school necessary to become an automotive technician. You have to go to auto-tech school for at least two years to get your degree. Then you can get your job.
A man who does everything in the auto field is often referred to as an "automotive technician" or "mechanic." If he specializes in various aspects, such as repair, maintenance, and diagnostics, he might also be called a "master technician." In a broader sense, terms like "automotive expert" or "auto specialist" may apply as well.
The first technician is correct, it is a coarse thread. I'm not sure there is a bolt called 12-13 so I am assuming you meant 1/2 - 13. Wich would be a bolt 1/2 inches long. The diameter of a #13 unc bolt would be ( 13 x .013in ) + .06 = .229 inches in diameter.
The University of Alaska, Anchorage offers a certificate program in Automotive Technology.
One can learn about automotive care by looking at a manual which can be bought at any book store. Also, one can find more information by asking someone who is skilled in automotive care. One example is an auto technician.
The Auto Technician's role is to inspect and repair cars.
An auto body technician typically needs a high school diploma or equivalent, along with specialized training or an apprenticeship in auto body repair. While a specific license is not always required, some states may mandate certification or licensing for auto body shops, particularly for those dealing with automotive collision repair. Additionally, certifications from organizations like the National Institute for Automotive Service Excellence (ASE) can enhance job prospects and credibility in the field.
Some places require a 2 year degree in automotive service while others will have you start out as an aprentice and work your way up.
You can find an automotive degree online at www.directoryofschools.com/.../Auto.../Online-Automotive-Degrees and www.directoryofschools.com/auto-mechanic-school.htm.