I have to add one more to the thread. My late Dad was an aircraft mechanic during the war, a machinist, and a mechanic, specialized in auto trans, before moving to management in the local electrical utility and never owned a torque wrench. He built engines people would praise while working at the local Ford dealers. The electrical utilty came to the dealer and ask if he would come to work for them. He said, yes if you hire my brother. They worked together until then. The utility said he was too old and they could not hire him. My Dad so, no thanks then. The utility said, OK we will hire him too. I am sure the U S Navy had torque wrenches, but while growing up, going to work with him, while a kid, and repairing any and everything all out lives, I never saw him use a torque wrench. He helped me learn to set up gears in rear axles, also, tighten down vavle bodies in old Fordomatics and Cruise o Matics. He did have a special tool with a built in torque setting for adjusting the bands on auto transmissions. I don't guess I'm saying anything about torquing down stuff, I am just proud of my Dad and what he could do.