When you’re working on a construction project, choosing the correct screw size is essential to success. A screw that is too small won’t fit in a hole, while one that is too large can damage the material it’s connecting to. Understanding how to measure screw diameter, length and threads will help you make the best choice for your job.
There are three important measurements to understand when determining which screw is the right fit: gauge, length and threads per inch (TPI). Screw packaging often lists these dimensions as part of the product name. For example, a package of Duraspin screws might read as “#8 x 1-1/4″.” You can find more information on these measurements here.
Gauge: This measurement represents the width of the screw’s head in inches or millimeters. Screws can be measured by using a ruler or tape measure, or you can use a special screw measuring tool. To determine your screw gauge, you will need to look at a gauge chart that matches the gauge number to a fraction of an inch.
Length: This measurement refers to the distance from the head of the screw to its tip. Screws with a round head can be measured by using a stick or straw, and you will need to measure its length to find the correct screw size. You can also use a caliper to accurately measure the length of your screw.
Threads: Screw threads can be classified as either coarse or fine, depending on the type of materials they are designed for. A coarse-threaded screw will have larger threads and a higher load capacity, while a fine-threaded screw has smaller, tighter threads and can fit into materials that are more delicate. screw sizes