The 16th Scale is easier than the 32nd Scale for measuring Fractional bolts.
Step 1 • Determine if the bolt is Metric or Standard
Step 2 is to determine the Size • Size means the diameter of the bolt across the threads.
Step 3 is to determine the thread pitch. • Pitch means the number of threads per inch for a standard bolt. • Pitch means the distance between threads for a metric bolt.
Step 4 is to measure the length • Length is measured from the bottom of the head to the end of the thread
The 5th step is to determine the Head size. • Head size is measured from flat to flat.
Die Size • Standard Die Size – Pitch Example: 3/8 – 14 Metric Die Size – Pitch Example: 10 X 1.25
Standard Bolt Sizing Length Bolt Size Head Size Pitch = number of threads per inch
Metric Bolt Sizing 8.8 Length Bolt Size Head Size Pitch = distance between threads in mm