304 Stainless Steel Double-End Threaded Expansion Anchor Bolts | M6 M8 M10 M12 | 100–250mm

As a general rule, the bolt length should equal the fixture thickness plus the minimum embedment depth in the base material. For concrete, embedment is typically 4–6× the bolt diameter. For example, an M8 bolt anchoring a 20mm bracket into concrete generally needs at least 50–60mm of embedment, so a 100mm (≈3.9") bolt is a common starting point. Always verify with your structural requirements.

Load capacity depends on bolt diameter, embedment depth, and base material strength. In standard concrete (C20/25), an M8 expansion anchor typically carries 3–5 kN in tension and 2–4 kN in shear. Larger diameters (M10, M12) carry proportionally higher loads. Always consult a structural engineer for safety-critical applications.

Yes. Made from 304 stainless steel, these bolts offer good corrosion resistance in most outdoor environments including rain, humidity, and mild coastal exposure. For highly aggressive marine or chloride-rich environments, 316 stainless steel is generally recommended instead.

These bolts use standard ISO metric coarse threads (M6, M8, M10, M12), compatible with off-the-shelf metric nuts and washers. The double-end threaded design means both ends are fully threaded, allowing attachment of nuts or fixtures on either side of the anchor point.

These expansion anchor bolts are designed primarily for solid concrete, brick, and masonry. They are generally not recommended for hollow block, aerated concrete (AAC), or soft materials without additional engineering review. When in doubt, contact us to confirm suitability for your specific substrate.

Drill a hole matching the bolt diameter and required embedment depth. Clean out dust and debris with a brush or compressed air. Insert the anchor bolt and expand it by tightening the nut — the expansion sleeve grips the hole walls. Attach your fixture to the exposed threaded end and secure with a nut and washer. Torque to the manufacturer's specification for your diameter.

M6 is typically used for light fixtures, cable trays, and small brackets. M8 suits medium-duty applications like shelving and equipment mounts. M10 and M12 are used for heavier structural connections such as handrails, machinery bases, and structural steel. When in doubt, go one size up for a safety margin.