Drill Size = Major Diameter - (.975 divided by the number of threads per inch). For example, with a 1/4-32 tap, .250 - .0305 = .2195 (7/32 or #2 drill size). Metric tap drill sizes are the diameter minus the pitch (For example, 42mm x 1.5 tap uses a 40.5 drill). Follow these links to browse our taps and die selection:
It is easy to construct a concave figure if the figure has at least 4 sides Just make sure that one interior angle is bigger than 180 degrees. In other words, an interior angle should be a reflex angle Why am I saying at least 4 sides? It is possible to make a concave triangle? The answer is no! Since the sum of the interior angles in any triangle must add up to 180 degrees, no interior angles can be more than 180. It is impossible! Buy a comprehensive geometric formulas ebook.
there are exactly 180 degrees in a triangle, no matter if it is an obtuse, acute or right triangle. The some of all the angles in a triangle will always be 180 degrees. Of course, there are exceptions to this. The angles of a triangle are 180 degrees only when drawn on a plane. If you were to draw a triangle on a curve surface, then the angles wouldn't add up to 180 degrees. Take for example, Earth.