As correctly pointed out by ASimpson, there are classification of fits which are application specific. He lists the metric version, imperial are equivalents noting 1.0 inch = 25.4 mm. There are several good references on this, look to the web. But the Machinist Handbook does discuss this, at least in the 23rd edition.
How does Dhea work? DHEA is a parent hormone produced by the adrenal glands near the kidneys and in the liver. In men, DHEA is also secreted by the testes. It is changed in the body to a hormone called androstenedione. Androstenedione is then changed into the major male and female hormones.
Once produced, your body converts it to several other hormones, including androstenedione and several sex hormones, earning it the nick name âthe parent hormone.â In some ways, DHEA works like a natural anabolic steroid, since it boosts production of natural growth hormones that help build lean muscle mass and fight fat accumulation. Thatâs why the supplement form is popular among athletes and bodybuilders.