What Size Hole Do You Need for an M8 Bolt?

Learn the ideal hole sizes for M8 bolts to ensure proper fitting for your projects.

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For an M8 bolt, the typical hole size is 8.5mm if you’re cutting threads. If the bolt is to pass through without threading, you may need a slightly larger hole, around 9mm. Proper measurement assures secure and efficient fitting for your projects.

FAQs & Answers

  1. What is the standard hole size for an M8 bolt? The standard hole size for an M8 bolt is typically 8.5mm.
  2. Do I need a larger hole for an M8 bolt? Yes, if the M8 bolt needs to pass through without threading, a hole size of around 9mm is recommended.
  3. How do I measure hole sizes for bolts? Use a caliper or drill bit gauge for precise measurements when drilling holes for bolts.
  4. What happens if the hole is too small for the M8 bolt? If the hole is too small, it can cause difficulty in inserting the bolt and may damage the bolt or material.