Thus, an M2 x 0.4 screw has threads every 0.4mm. Although most metric fasteners have two or more standard pitches (fine & coarse threads), the pitch is often omitted from a thread callout; it is always helpful to carry a sample with you to the hardware store.
A tincture is a liquid extract made by soaking herbs in alcohol to extract the active ingredients from the herbs. Alcohol is considered an excellent solvent because it is food grade and can extract herbal constituents, such as resins and alkaloids, that are poorly soluble in water.
Acupuncture means the insertion of fine metal needles through the skin at specific points on or near the surface of the body with or without the palpitation of specific points on the body and with or without the application of electric current or heat to the needles or skin, or both.