I elected to purchase a professional grade inch-pound torque wrench to attach the HS-411BPP to the HS-603PP assembly. Using the torque wrench set to 22 in-lbs, I set the AN5 bolts. Unfortunately due to inexperience with the tool, I over torqued the first bolt that I attempted to install, and had to remove it Lesson learned I placed a new bolt on order, and installed the three other bolt successfully.