Galvanized Through Bolts Expansion Anchor Bolts M6–M24 | Wall Anchoring

Generally, the bolt length should equal the base material thickness plus the anchor embedment depth required by your load spec. As a rule of thumb, embedment depth is typically 8–10× the bolt diameter. For example, an M10 bolt anchoring into concrete typically needs at least 80–100mm (≈3.1–3.9") of embedment. Always add the thickness of the fixture being fastened to get your total bolt length.

Load capacity depends on bolt diameter, embedment depth, and base material strength. In general, galvanized through bolts in this size range (M6–M24) are suitable for medium to heavy structural loads. For critical structural applications, consult an engineer and refer to the manufacturer's published pull-out and shear values for your specific base material.

Yes. The zinc galvanized coating provides corrosion resistance suitable for most outdoor and moderately humid environments. For highly corrosive environments — such as coastal areas or chemical exposure — stainless steel anchors are generally recommended instead.

These through bolts use standard ISO metric coarse threads (M6 through M24), compatible with standard metric nuts and washers. They are not compatible with UNC/UNF inch-standard fasteners. If you're unsure, check your existing hardware for an "M" designation on the thread size.

These expansion anchor through bolts are designed for solid concrete, brick, block, and other dense masonry materials. They are generally not suitable for hollow block, drywall, or soft substrates without additional anchoring hardware. When in doubt, test pull-out strength before applying full load.

Drill a hole matching the bolt diameter into the base material to the required depth. Insert the through bolt with its expansion sleeve into the hole through the fixture. Tighten the nut — as the nut is tightened, the sleeve expands against the hole wall, creating a secure mechanical lock. Torque to the recommended specification for your bolt size and application.

For light-duty shelf brackets into concrete or brick, M6 or M8 through bolts are typically sufficient. For heavier shelving, equipment mounts, or structural brackets, M10–M12 is generally recommended. For very heavy machinery or structural connections, M16 and above are commonly used. When in doubt, size up — a larger anchor bolt costs little more but provides meaningful additional safety margin.