Thread lock for threaded connection has nut thread modified from standard internal thread so that maximum external diameter is within tolerance field of bolt thread

摘要

The thread lock consists of a plastic nut body (2*) with a nut thread (4*) and a bolt having a standard external thread of preset tolerance field. The nut thread is modified so that its maximum external diameter is within the tolerance field for the external diameter of the bold thread. The rise of the nut thread is also altered so that the deformation of the nut body remains within permissible limits.