Eye Bolt Sleeve Anchors for Concrete — Zinc-Plated & 304 Stainless Steel

Match the anchor diameter to your load requirements and the hole you can drill. As a general guide: Ф6.5mm (≈1/4") is typically used for light-duty hanging such as small fixtures or cable guides; Ф8mm (≈5/16") suits moderate loads like lighting pendants or rope rigging; Ф10mm (≈3/8") handles heavier rigging points and swing attachments; Ф12mm (≈1/2") is generally chosen for the heaviest applications. Always verify against a load table for your specific concrete compressive strength.

Pull-out and shear capacity depend on anchor diameter, embedment depth, and the compressive strength of the base concrete. In general, larger diameters and deeper embedment yield higher capacity. For safety-critical or overhead load applications, consult a structural engineer and request the anchor's load data sheet. Contact us to confirm working load limits for a specific size.

The 304 stainless steel variants are well-suited for outdoor concrete sleeve anchor installations and damp or humid environments — they resist rust and surface oxidation effectively. The zinc-plated iron variants are generally intended for dry or semi-protected indoor use. For coastal or highly corrosive environments, 316 stainless steel is typically recommended; contact us if you need that grade.

These anchors use metric threads consistent with their nominal diameter (M6.5, M8, M10, M12), making them compatible with standard metric shackles, hooks, and rigging hardware. Thread pitch varies by size — contact us to confirm the exact pitch for your size if needed for a specific fitting.

You'll need a carbide-tipped masonry drill bit matching the anchor's nominal diameter and a rotary hammer drill for best results in hard concrete. After drilling, vacuum or blow out the hole to remove dust, insert the anchor, and tighten the eye bolt to expand the sleeve. No epoxy or adhesive is required — the anchor is mechanically load-ready once properly torqued.

Choose zinc-plated iron for cost-effective installations in dry, indoor environments where corrosion exposure is minimal. Choose 304 stainless steel when the anchor will be exposed to moisture, rain, humidity, or outdoor conditions — it provides significantly better long-term corrosion resistance. The stainless option is also a good choice for food-processing or washdown environments.

Sleeve anchors generally perform well in solid concrete and hard masonry such as solid brick or dense block. Performance in hollow block or soft masonry is typically reduced because the expansion sleeve may not have sufficient material to grip. Always test a sample installation and verify pull-out strength before relying on anchors in non-solid substrates.