The T-Bolts And Nuts are not fixed, you can choose the types of nuts and length of T bolt whatever to fit your equipment.
How do I know what size nut I need for a bolt?
Place the end of a measuring tape on one of the flat sides of the nut’s outer perimeter. Stretch the tape measure across the nut’s diameter to the flat-side directly across from the one your pulling from. If the nut is metric, count the number of lines on the tape measure to find the measurement.