Cap screw bolt, to link a vehicle brake hose to a brake line, is tightened in a prismatic opening coaxial to the longitudinal axis of the center drilling through the screw bolt with a high torque transfer between the tool and the bolt

摘要

The cap screw bolt (11) between a brake hose and the brake line, in a vehicle braking system, has a center drilling (12) and an outer threading (13). A prismatic opening (15) is coaxial to the longitudinal axis of the center drilling to tighten the cap screw bolt, with a polygonal cross section. The cross section of the opening can be structured to give the maximum torque transfer between the tool and the screw head in the smallest space.