Comments by "Al Christensen" (@alchristensen8121) on "Build A Better Magnetic Phone Dash Mount. Durable, All Metal" video.

  1. Well, technically, the 20 in 1/4-20 means twenty threads per inch. There are also 1/4-28 and 1/4-32. So 1/4-20 is the coarse thread of the group by default. They're also the most common.
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