# How To Measure Thread Size Of A Bolt

How To Measure Thread Size Of A Bolt. • bolt diameters under a 1/4” are in number sizes from 0 to 12 o to find the diameter of these use. How do you read thread size?

There are two common methods to write the thread dimensions. How bolt sizes are expressed. Thread sizes are given in nominal sizes, not in actual measurement.

### Use Inches For Standard Bolts And Millimeters For Metric Bolts.

Measure screw diameter, or screw size, by measuring the width of the threaded part of the screw. What does thread size mean? You can also place a bolt scale on top of the hole and it can tell you the size.

Because this is approximately the same as the major or thread diameter the thread diameter measurement can be used for fully threaded bolts. Then read the pitch off the gauge. Bolts commonly use four types of measurement, while nuts use only two.

### Via The Diameter You Can Now Determine Whether It Is An Inch Thread Or A Metric Thread.

How bolt sizes are expressed. This tool will help you identify the diameter, thread pitch, and length , which are the 3 main d. This is called the major diameter and will usually be the proper size of the bolt.

### In The Table Below You Can Find Out The.

To measure the diameter of screws and bolts, you measure the distance from the outer thread on one side to the outer thread on the other side. For inches, any diameter smaller than 1/4 is indicated by a number, referenced in the table below (e.g. There are two common methods to write the thread dimensions.

### For Example, A 6Mm Bolt May Measure 5.8Mm Or 5.9Mm, But It Is Called 6Mm Bolt.

Simply insert the trial gauges into the threads until the gauge fits perfectly. Bolt measurements can be calculated in millimeters or inches, but bolt measurements specified in inches are international. For metric bold thread size, the formula is the thread diameter, followed by the x symbol and then the thread pitch number.