Stainless Steel Expansion Bolts Rawl Bolts for Concrete & Masonry — M6 M8 M10 M12

Select the thread diameter based on the load and the hardware you are connecting — M6 or M8 for light-duty brackets and cable supports, M10 for medium-duty structural fixings, M12 for heavier loads. For length, the bolt should embed at least 4–6 times its diameter into the base material. For example, an M10 bolt typically needs at least 40–60mm (≈1.6–2.4") of embedment. Add the thickness of the material being fixed through to determine the total bolt length needed.

Load capacity depends on bolt diameter, embedment depth, concrete compressive strength, and edge/spacing distances. In solid concrete, an M10 sleeve anchor can typically handle several hundred pounds of tensile load under ideal conditions. For safety-critical, overhead, or structural applications, always consult a licensed structural engineer and follow local building codes.

Yes. Stainless steel provides good corrosion resistance for outdoor, humid, and mildly corrosive environments. For coastal or marine applications with prolonged salt-water exposure, the specific stainless grade matters — A4 (316) is generally preferred over A2 (304) in those conditions. Contact us to confirm the grade before ordering if this is a concern.

These expansion bolts use standard metric coarse threads (M6, M8, M10, M12) conforming to ISO 261 / DIN standards. They are compatible with standard metric nuts, flat washers, spring washers, threaded rod couplers, and structural brackets. No adapters are required for standard metric fittings.

Use a carbide-tipped masonry or hammer drill bit matching the bolt's nominal diameter — for example, a 10mm bit for an M10 anchor. Drill depth should equal the bolt's shank length plus approximately 5–10mm extra to allow for dust at the bottom of the hole. Always blow out the hole with compressed air before inserting the anchor to ensure full sleeve contact with the bore wall.

These sleeve expansion anchors are designed for solid concrete and dense masonry. They can generally be used in solid brick, but performance is typically reduced in hollow block, aerated concrete (AAC), or soft brick. For hollow substrates, a chemical anchor or toggle bolt is usually a more reliable choice.

Sleeve expansion anchors are generally not recommended for reuse. Once the sleeve has expanded inside the bore, reinstalling the same anchor in the same hole typically results in reduced holding strength. For a new installation, always use a fresh anchor in a new hole drilled to the correct diameter and depth.

These bolts are available in packs of 1, 2, 4, 5, or 10 pieces depending on the size selected. Choose the quantity that matches your project scope — a single piece for a one-off repair, a 5- or 10-pack for multi-bracket or railing installations. Buying in larger packs generally offers a lower per-piece cost.