Thread size actual diameter is 5.87mm so guessing it is considered 6mm

The threads are LEFT HAND

Overall Length is 3-21/64" 

Each plastic end measures 18.5mm wide x 35mm Long x 13.75mm Tall

The maximum opening distance between the plastic ends is about 43.5mm

The round steel piece which surrounds the head of the hex bolt measures 18.5mm diameter 

I do not see a model number

If you need more dimensions just ask 

Counter top worktop connecting tool