Refrigerant Lines Installation Note

WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Tighten the bolt of joint by hand.
Tighten the joint to the specified torque.
Connect the block joint type pipes by grasping the female side of the block with pliers or similar tool and holding firmly, then tighten the connection bolt with a torque wrench.

Fig 1: Connecting Block Joint Type Lines
Courtesy of MAZDA MOTORS CORP.