Huck Bolt Diameter Conversion Table.

Converting Huck's imperial measurements to metric. 

Handy table that converts imperial to metric.   

Scale check

Why is there a different measurement system?

The USA still uses the imperial system for most of its manufacturing, so changing over is difficult. Australia adopted the metric system from 1970 (Metric Conversion Act 1970); it is based on the metre for length and the kilogram for mass. After the French Revolution, the government asked scientists to look into replacing thousands of different traditional measurement systems with one that could unify the country. The meter was developed by measuring one-ten-millionth of the quadrant of Earth’s circumference running from the North Pole to the equator, through Paris. The new unit, equal to about thirty-nine inches, was called a meter, and all measurements were based upon it.