Expansion Anchor Bolt Sizes mm Charts & Expert Sizing Guide

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Q: What are the standard expansion anchor bolt sizes available?

A: Standard expansion anchor bolt sizes range from M6 (6 mm diameter) to M20 (20 mm diameter), with lengths between 30 mm to 300 mm. Sizes vary based on load capacity and material. Always check manufacturer guidelines for specific applications.

Q: How do expansion anchor sizes differ from regular bolt sizes?

A: Expansion anchor sizes include both the bolt diameter and sleeve dimensions for secure anchoring. For example, an M10 expansion anchor may require a 12 mm hole. Regular bolts focus only on thread and shaft measurements.

Q: What are common expansion bolt sizes in mm for concrete walls?

A: Common expansion bolt sizes in mm for concrete are M8, M10, and M12, with lengths from 50 mm to 150 mm. Larger sizes like M16 or M20 are used for heavy-duty loads. Match the size to the wall thickness and weight requirements.

Q: How to choose the right expansion anchor size for a project?

A: Select based on the load weight, base material (e.g., concrete, brick), and hole depth. For example, use M6-M10 for light fixtures and M12-M16 for structural supports. Consult engineering charts for precise calculations.

Q: Are expansion anchor bolt sizes universal across materials?

A: No, sizes may vary slightly between materials like stainless steel or zinc-plated steel due to strength differences. For instance, a stainless M8 bolt might have a thicker sleeve than a zinc-plated one. Verify compatibility with the material specs.