self-loosening of nuts and bolts is rarely a good thing. Engineers have come up with dozens of ways to make sure the world doesn’t fall apart, and some work better than others. Let’s explore a ...

all three nuts will spin down the bolt under the force of gravity alone. Although the bidirectional nut doesn’t move as smoothly as the other two, it can change rotation and translation ...

The fact that all U. S. bolts, nuts & rivets are now made in standard sizes is one of the triumphs of Herbert Clark Hoover’s career. One of his great doctrines as Secretary of Commerce was that U.

The bolts were just screws with straight sides and ... Now was the time to put it back so that it wouldn't come loose again. Tune in next month for the exciting climax.