There are more than 200 billion fasteners which are consumed every year in the U.S. market. More than 10% of the fasteners produced in the United States are used within the automotive industry. (Industry Today)
How many bolts hold the trucks of a rail car together?
Highlight for an unexpected answer: —> A box car rides on two trucks (called “bogies” on overseas railways). Each is a 9,000-pound assembly of individual components (including, but not limited to, axles, wheels, and truck side frames) held together only by gravity and the interlocking surfaces on the principal parts.