Sleeve Anchor Expansion Bolts for Masonry – Zinc Plated | M6 M8 M10 M12 M16

A general rule is that the anchor should embed at least 6–10 times its diameter into the base material. For example, an M8 anchor typically requires at least 48–80mm of embedment depth. Add the thickness of the fixture being attached to determine the minimum bolt length you need. Available lengths in this listing range from 40mm (≈1-9/16") to 200mm (≈7-7/8"), covering most standard masonry anchoring scenarios.

Load capacity depends on anchor diameter, embedment depth, and the compressive strength of the base material. Generally, M6 anchors handle lighter loads (typically up to ~1 kN shear in standard concrete), while M16 anchors can handle significantly higher loads. For safety-critical or structural applications, always consult a qualified structural engineer and verify against your specific concrete grade.

The zinc plating provides moderate corrosion resistance, making these anchors well-suited for dry indoor use and sheltered outdoor masonry applications. For prolonged exposure to rain, coastal salt air, or standing water, stainless steel sleeve anchors are generally the more appropriate choice to prevent rust and long-term degradation.

These are standard ISO metric coarse-thread anchors (M6, M8, M10, M12, M16). They accept any standard metric hex nut and flat washer of the corresponding size, and are compatible with metric threaded rod couplers and other metric fastener hardware commonly used in construction and DIY projects in the US and internationally.

Sleeve anchors are designed for solid, dense base materials — primarily solid concrete, clay brick, and dense concrete block. They are generally not suitable for hollow block, aerated autoclaved concrete (AAC), drywall, or soft materials where the expansion sleeve cannot engage the borehole wall properly. When in doubt, test a sample anchor in your specific substrate before committing to a full installation.

1. Drill a hole matching the anchor diameter (e.g., an 8mm masonry bit for an M8 anchor) to the required embedment depth plus fixture thickness. 2. Clear dust and debris from the hole using a blow pump or brush. 3. Insert the anchor through the fixture hole and into the drilled hole. 4. Hand-tighten the nut, then use a spanner or socket wrench to torque to the manufacturer's recommended value. As the nut tightens, the sleeve expands against the borehole wall to create a secure mechanical hold.

For standard light-duty shelving brackets, M6×40mm or M8×60mm anchors are typically sufficient. For heavy-duty shelving, industrial racking, or wall-mounted cabinets with significant load, M10 or M12 anchors with deeper embedment are generally recommended. Always check the bracket or fixture manufacturer's fastener specifications and factor in the total expected load.