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

## Step 1<br />Bolts are typically identified by three numbers. The first number represents the number of threads per inch, the second number represents the diameter of the bolt in sixteenths of an inch, and the third number represents the length of the bolt in inches.<br /><br />## Step 2<br />In this problem, we are asked to identify what the second number represents. According to the standard identification system for bolts, the second number represents the diameter of the bolt in sixteenths of an inch.