A SAFETY CONNECTING DEVICE, IN PARTICULAR FOR PIPING, AN END-COUPLER FOR SUCH DEVICE, AND A METHOD FOR MANUFACTURING A NUT THEREFOR.

摘要

The device connects a first end-coupler (1) with a second end-coupler (2), in particular of a piping. A nut (15) is provided with a threaded bore (17) in which the first end-coupler (1) is screwed along a longitudinal axis (X). In a tightening position, the first end-coupler (1) is in axial stress with a second end-coupler (2) accommodated in the nut. Anti-rotation means are provided between the nut (15, 115) and at least one (2) of the end-couplers to prevent relative rotation except when a torque exceeding a predetermined threshold is applied thereto. The anti-rotation means consist of at least one tab (21) made in the material of the nut (15) to lockingly interfere with substantially planar faces formed on the second end-coupler (2).