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.
The interior angles of a regular polygon are each 120Â°. Calculate the number of sides. The interior angles are 120Â°, so the exterior angles are 180Â° - 120Â° = 60Â°. The exterior angles add up to 360Â°, so if we divide 360Â° by 60Â° we find there are 6 exterior angles. Therefore, there are 6 sides (it is a hexagon).