Stainless Steel Concrete Anchor Bolts — M6 M8 M10 M12 Socket Expansion Bolts for Masonry

A general rule: the bolt length should be at least 2–3 times the bolt diameter plus the thickness of the material being fastened. For example, an M8 bolt fastening a 10mm bracket into concrete would typically need at least 50–60mm (≈2–2.4") of embedment. When in doubt, go longer — expansion anchors generally perform better with deeper embedment.

Load capacity depends on bolt diameter, embedment depth, and the compressive strength of the base material. Generally, M6 anchors in standard concrete handle tensile loads in the range of 1–2 kN, while M12 anchors can typically handle 5–8 kN or more. Always consult a structural engineer for load-critical or overhead applications.

Yes. A2 (304) stainless steel provides good corrosion resistance in most outdoor and mildly corrosive environments, including rain exposure and occasional moisture contact. For coastal locations or environments with high chloride exposure (e.g., near saltwater), A4 (316) stainless steel is generally the recommended choice.

These bolts use standard ISO metric coarse threads (M6, M8, M10, M12), compatible with standard metric nuts, washers, and threaded inserts. They are not compatible with UNC or UNF inch-standard threads used in some North American applications.

These are hex socket (Allen key) drive bolts. You will need an Allen wrench or hex bit of the appropriate size — typically 5mm for M6, 6mm for M8, 8mm for M10, and 10mm for M12, though this can vary by manufacturer. A torque wrench is recommended for any load-bearing installation to avoid over-tightening.

These expansion anchors are designed primarily for solid concrete and dense masonry. They can generally be used in solid brick with good results. Performance in hollow concrete block, aerated concrete (AAC/Hebel), or soft brick is typically reduced and may be unreliable. For hollow or low-density substrates, a sleeve anchor or chemical anchor is usually a better fit.

Match the bolt diameter to the load requirement and the clearance hole in your fixture. M6 is well-suited for light-duty brackets, cable trays, and fixtures. M8 is a common general-purpose size for shelving, equipment mounting, and handrails. M10 and M12 are used for heavier structural connections such as post bases, machinery anchoring, and structural steel. When load requirements are uncertain, sizing up is the safer approach.