Understanding M8 Bolts: Are They Really 8mm?

Learn what M8 bolts are and how their designation indicates size in millimeters.

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Yes, M8 bolts are 8mm. The 'M' designation stands for metric, and the number following it signifies the nominal outer diameter of the bolt shaft in millimeters. Thus, an M8 bolt has an outer diameter of 8mm.

FAQs & Answers

  1. What does M8 mean? The 'M' indicates a metric bolt, and '8' represents the nominal outer diameter in millimeters, making it 8mm.
  2. What are common uses for M8 bolts? M8 bolts are commonly used in various construction and mechanical applications, offering reliable fastening solutions.
  3. How do M8 bolts compare to other bolt sizes? M8 bolts are part of the metric system; they are larger than M6 bolts and smaller than M10 bolts, which reflects their respective outer diameters in millimeters.

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For further insights into different bolt sizes and applications, check out our guides on metric and imperial fasteners, or explore specific measurements for other common bolt types.

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