Although anyone can get de Quervain's tenosynovitis, it affects women eight to 10 times more often than men. It may happen in the time just after pregnancy. Symptoms. Pain along the back of the thumb, directly over two thumb tendons, is common in de Quervain's. The condition can happen gradually or start suddenly. In either case, the pain may travel into the thumb or up the forearm.
This is the number of complete threads occurring in one inch of threaded length. Metric thread pitch is. designated as the distance between threads (pitch) in millimeters. On an internal thread, the minor diameter occurs at the crests and the major diameter occurs at. the roots. On an external thread, the major diameter is at the thread crests, and the minor diameter. is at the thread roots. The flank angle is the angle between a flank and the. perpendicular thread axis.
#12. Diameters 1/4 inch and larger are converted from decimals to fractions in 1/16 inch increments. a) MAJOR DIAMETER: The largest diameter of a screw thread; measured from the crests on external threads and the roots on internal threads.b) PITCH DIAMETER: The imaginary diameter equal distance between the major and minor diameters.) MINOR DIAMETER: The smaller diameter of a screw thread; measured from the roots on external threads and the crests on internal threads. d) THREAD PITCH: The distance between a given point on a thread and a corresponding point on the next thread.