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In order to minimize the chances of a rod failure, the rod bolts must be checked for stretch and not simply torqued down. Stretch should be between 0.0055- and 0.007-inch. In order to make measurements as precise as possible with a bolt stretch gauge, RCE dimples the center of the rod bolts with a carbide drill bit. In this photo, the top bolt has been done while the bottom two are still unmodified.