Identifying Metric vs. Imperial Bolts

What is one of the easiest ways to determine if a bolt is metric or imperial?

• Measure the head shape

• Look at the color of the bolt

• Check the markings on the bolt head

• Weigh the bolt on a scale

What unit of measurement is used for the diameter of a metric bolt?

• Inches

• Millimeters

• Centimeters

• Feet

How can you determine the thread pitch difference between metric and imperial bolts?

• Imperial bolts have threads measured in threads per inch (TPI), while metric bolts have thread pitch measured in millimeters per thread

• Metric bolts always have fewer threads than imperial bolts

• Imperial bolts use metric thread pitches

• There is no difference in thread measurement between metric and imperial bolts

Which tool is commonly used to measure the thread pitch of a bolt?

• A caliper

• A ruler

• A thread gauge

• A torque wrench

If you have a bolt labeled M8 x 1.25, what does this tell you?

• It is an imperial bolt with an 8-inch diameter

• It is a metric bolt with an 8mm diameter and a thread pitch of 1.25mm

• It is an imperial bolt with 8 TPI

• It is a metric bolt with a thread pitch of 8mm