Nuts are hexagonal metal heads usually threaded over long, rod-shaped bolts. When mated with, or connected to, a bolt, a nut provides strong fastening and holding power. Nuts and bolts are used in almost every trade imaginable, from home construction and bicycle manufacturing to car production and shipbuilding. Though a variety of different types of nuts exist, including slotted, square, nylon locking and acorn nuts, most all are tightened and adjusted in the same way.

Check that all the nuts around your house are snug and secure.

Step 1

Squeeze a small bead of grease onto your fingertip and apply it to the bolt's thread. Grease prevents nuts from rusting into place on the bolt.

Step 2

Fit the nut straight over the tip of the bolt and begin finger tightening it over the threads by turning the nut clockwise. Ensure that the nut is not crooked, or you may strip the bolt's threads.

Step 3

Place an appropriately sized wrench head around the nut's edges. If you are using an adjustable wrench, move the jaws of the wrench so that they fit snugly around the nut's edges.

Step 4

Turn the nut clockwise using the wrench. Turn the nut with a slow, steady motion.

Step 5

Apply firm and even pressure to the wrench handle as the nut gets tighter to ensure a snug fit.