When a Bolt size is called out with 3 numbers the third number is the __ ? Length Diameter Threads per inch

## Step 1<br />Bolts are typically identified by three numbers. The first number represents the diameter of the bolt, the second number represents the length of the bolt, and the third number represents the number of threads per inch.<br /><br />## Step 2<br />In this problem, the third number is the number of threads per inch. This is because the first number is the diameter, the second number is the length, and the third number is the number of threads per inch.