Zinc-Plated Expansion Sleeve Anchor Bolts for Concrete & Masonry — Ø 6.5mm to 16mm

Match the sleeve diameter to your drill bit size — a 6.5mm sleeve requires a 6.5mm masonry bit, an 8mm sleeve requires an 8mm bit, and so on. For embedment length, a general rule is to use a depth of at least 4× the sleeve diameter in solid concrete. For example, a 10mm sleeve would typically need at least 40mm of embedment. Longer anchors (60mm–105mm) are suited for heavier loads or softer masonry. Available lengths in this listing range from 40mm (≈1-9/16") to 105mm (≈4-1/8") depending on the diameter chosen.

Load capacity varies by sleeve diameter, embedment depth, and substrate quality. Generally, a 6.5mm anchor in solid concrete can handle lighter fixture loads, while a 16mm anchor with 75mm embedment can support significantly heavier structural loads. For safety-critical applications — overhead fixtures, handrails, or machinery — always have a structural engineer specify the anchor size and spacing.

The zinc plating provides corrosion resistance adequate for dry indoor use and sheltered outdoor masonry fastening (e.g., under an eave or in a covered garage). For applications with direct rain exposure, coastal salt air, or standing water, a stainless steel expansion anchor is generally the more appropriate choice for long-term durability.

These anchors use metric coarse threads. The bolt diameter typically corresponds to the sleeve size — for example, a 6.5mm sleeve generally pairs with an M6 bolt, an 8mm sleeve with an M8 bolt, and a 16mm sleeve typically with an M12 or M14 bolt. Please check the specific variant description or contact us to confirm the exact bolt thread for your chosen size before ordering.

These anchors are designed for solid concrete, brick, natural stone, and dense masonry block — materials that provide the solid resistance needed for the sleeve to expand and grip. They are generally not suitable for hollow concrete block (CMU), drywall, wood, or soft aerated concrete (AAC block) without engineering review, as the sleeve may not develop adequate holding strength in those substrates.

You'll need a hammer drill with a carbide-tipped masonry bit matching the sleeve diameter, a hammer to tap the anchor flush with the surface, and a standard wrench or socket set to tighten the bolt. No specialty installation tools are required — these are designed for straightforward DIY and professional installation with common workshop equipment.

No — expansion sleeve anchors are generally single-use fasteners. When the bolt is tightened, the sleeve permanently deforms to grip the hole wall. Once removed, the sleeve's expanded shape means it will not develop the same holding strength if reinstalled. For applications where you anticipate future removal and reinstallation, consider a removable anchor system instead.