FIELD: mechanical engineering.
SUBSTANCE: threaded connection comprises male part of the threaded connection and locking coupling each of which is provided with contact surface having threaded section and section without thread. The lubricating coating is made of bottom layer of a lubricant in liquid phase at a temperature from 0 to 40°C and top layer of lubricant in solid phase at a temperature 40°C.
EFFECT: enhanced reliability.
13 cl, 2 dwg
