Since the length of the bolt is the last number in a metric measurement, you should measure for it last. Start from right below the head, including only the shank. Second measure the pitch. Pitch is threads / per unit. Inches are measured threads per inches. Metric are measured thread per millimeter. Third measure length. Bolt Size, Metric Bolt Size, How to Measure a Bolt, Metric Bolt Measurement, how to measure bolts, how to measure metric bolts, bolt measurements.
The diameter of a bolt is the Shank diameter, expressed in millimetres for Metric bolts. Fastener length is measured from where the material surface is. Metric bolts are used for various fastening purposes, such as heavy machinery Use the ruler to measure the length from the underside of the bolt's head to the. Metric bolt sizes are specified in millimetres and include the diameter, pitch, low socket head types, are measured from under the head to the tip of the bolt.
The next number is the diameter size. For example, M8 is a metric screw and has a diameter of 8mm. To tell the difference, there This gauge allows you to easily measure the diameter of both metric and standard fasteners. If you want more.