1 Shows an axial half cross section of a double buffer and simple graduated fig. 1 shows an axial half cross section of length and diameter

摘要

The present invention relates to a device making it possible to control with precision and simply the length of the threaded with a threaded hole, as well as its diameter. It is constituted by a knurled or hexagonal (1) of a threaded part does not (2) and a threaded end piece (3) located at the end of a handle extended graduated to the laser (4) the zero is located on the top of the first thread (5). The user to check the conformity of the length which is threaded and the diameter of the tapped hole in the screwing device between the side (3) completely into the tapped hole and reads the value measured on the handle extended graduated to the laser (4). The device according to the invention is particularly adapted to the control of the parts in the service quality, as well as to produce the control of the parts during manufacture in machinists.