Types of Screws and Screwdrivers

Step 1: Screw Types
There are a wide variety of screws made from a varying materials with different features. Make sure you are using the right screw for the job.

Step 2: Brass Screws
Brass screws are not very strong, so the application is more decorative than structural -- they will age and darken adding beauty to wherever they are employed.

Step 3: Screw Heads
Screws come with a wide variety of heads -- Phillips, slotted, hex cap and others. Make sure you have the proper screwdriver or screw bit to go with your screws.

Step 4: Machine Screws
Machine screws are threaded so they will be used in area that is also threaded, or with a nut, a washer and a split washer. The threading adds strength and prevents the screw from loosening.

Step 5: By the Numbers
Every screw has a two-number designation. The first number ranges on a scale between four and fourteen, and denotes the screw circumference. The second number is the actual screw length.

Step 6: Self-Tapping Screws
Self-tapping screws bore their own holes as they are screwed in. These are great when working with sheet metal, or when you don't have time to pre-drill holes.

Step 7: Countersink Screws
Countersink screws are screws that have a tapered head, enabling the screw to be at the level of or just below the surface of what they are being screwed into.

Items You'll Need for this GMC Trade Secret

• Brass Screws
• Machine Screws
• Self-Tapping Screws
• Countersink Screws
• Screwdriver
• Screw Gun