M3–M12 Galvanised Eye Screws | Metric Closed Eye Bolts & Threaded Ring Hooks

Match the thread diameter (M3–M12) to your tapped hole or the material you're threading into. For shank length, the threaded portion should typically penetrate at least 1.5× the bolt diameter into the base material for a secure hold. For example, an M6 eye screw threading into wood should generally have at least 9mm of shank engagement. Lengths in this listing range from 8mm (≈5/16") to 150mm (≈5.9"). When in doubt, go slightly longer — you can always leave a few threads exposed, but too short means a weak connection.

Working load capacity depends on the thread diameter, shank engagement depth, and base material. Larger diameters (M10–M12) generally support heavier loads than smaller ones (M3–M5). For safety-critical or load-bearing applications, always verify the rated working load with a qualified engineer and apply an appropriate safety factor. These are suitable for light-duty hanging, cable routing, and rigging tasks — not rated for overhead lifting of people or heavy machinery. Contact us to confirm specifications for your specific use case.

The galvanised (zinc-coated) finish provides good corrosion resistance for general outdoor use — garden fencing, pergolas, covered timber structures, and shed installations. For prolonged exposure to saltwater spray, coastal environments, or highly corrosive chemicals, stainless steel eye screws are generally recommended instead. Inspect periodically and re-coat with zinc spray if the galvanising shows signs of wear.

All sizes use the ISO metric coarse thread standard. Thread pitches are: M3=0.5mm, M4=0.7mm, M5=0.8mm, M6=1.0mm, M8=1.25mm, M10=1.5mm, M12=1.75mm. These are compatible with standard metric hex nuts, wing nuts, threaded inserts, and tapped holes used in most workshop, construction, and engineering applications worldwide.

Yes. The closed-ring (fully enclosed loop) design is well-suited for attaching wire rope, cable, S-hooks, carabiners, and light chain. The closed eye prevents accidental disengagement, making it more secure than open-eye alternatives for hanging and light rigging applications such as garden wire tensioning, tool hanging rails, and DIY pulley systems.

For wood: pre-drill a pilot hole approximately 70–80% of the shank diameter to reduce splitting and make threading easier. For example, use a 2.5mm bit for M3, a 3.3mm bit for M4, and so on. For metal: use a correctly sized tapped hole matching the metric thread pitch. Thread in by hand first, then insert a screwdriver or rod through the eye for final tightening. Avoid over-torquing, especially in softer materials like pine or MDF.

For lightweight decorative applications such as fairy lights, picture wire, or small plant hangers, M3–M5 eye screws with lengths of 16–25mm are generally sufficient when installed into solid wood or a wall anchor. For heavier outdoor planters or hanging baskets, M6 or M8 with longer shanks (30mm+) are typically more appropriate. When in doubt, size up — a slightly larger eye screw in solid timber is always safer than a smaller one at its limit.