A safety connecting device in particular for piping an end coupler for such device and a method for manufacturing a nut therefor

摘要

pThe 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)./p