With the top and bottom nuts providing opposing forces on the bolt, the nuts are far less likely to self-loosen. A similar mechanism is at work in the wedge-locking washers. The two halves of the ...

The basic job of a wrench is to tighten or loosen nuts and bolts - something you can't do with any other tool. Fixed wrenches ...

Robot successfully moved moist soft tofu. By applying external magnetic fields, the team steered the robot to accomplish ...