Pin Type Anchor

Drill a hole of sufficient depth using a hammer drill and properly sized carbide bit of the same diameter as the anchor being installed.

Clean out hole of all the drilling dust.

Place washer and nut on the anchor, with nut flush with top so as to secure threads while the anchor is being hammered.

With nut, washer and pin in place, insert anchor through the material to be fastened and into the concrete base.

Using a proper sized hammer, set pin with several accurate strikes on head until it is flush with the top of anchor. 

The anchor is now properly set eliminating need to torque the nut. Tighten and thread the nut-washer assembly fully.