Eye Bolts Threaded Rings 4.8 Carbon Steel Catenary Wire Hanging Eyelet Screws

For light catenary wire (festoon lighting, thin cable up to 6 mm diameter), M6 or M8 eye bolts are typically sufficient. For heavier spans or thicker wire (6–10 mm), M10–M12 is recommended. For structural or long-span catenary runs carrying significant tension, M14–M16 or larger provides the necessary thread engagement and eye loop strength. Always calculate the expected load including wind and dynamic factors before selecting a size.

Grade 4.8 is an ISO property class for carbon steel fasteners. The "4" indicates a minimum tensile strength of 400 MPa, and the ".8" means the yield strength is 80% of tensile strength (320 MPa). This makes Grade 4.8 suitable for moderate structural loads. It is stronger than ungraded hardware store bolts but below Grade 8.8 or 10.9 high-tensile fasteners. For safety-critical overhead lifting, consult a structural engineer and consider certified lifting eye bolts.

Black oxide provides a thin conversion coating that offers mild corrosion resistance and reduces surface oxidation in dry or sheltered indoor environments. It is not a substitute for hot-dip galvanising or stainless steel in fully exposed outdoor or marine conditions. For permanent outdoor installations subject to rain, consider applying a clear lacquer or anti-corrosion wax over the black oxide finish, or choose stainless steel eye bolts instead.

Yes. The thread profile follows ISO metric coarse standards, so these eye bolts are directly compatible with standard metric hex nuts, coupling nuts, threaded inserts, and T-nuts in the corresponding size (M6 nut for M6 bolt, M10 nut for M10 bolt, etc.). They are not compatible with UNC or UNF inch-thread hardware.

The thread diameter determines both the pull-out strength from the substrate and the load capacity of the eye loop. As a general guide: M6–M8 for light fixtures, picture rails, and thin cable up to 5 kg point loads; M10–M12 for workshop cable management, hammocks, and loads up to 30–50 kg; M14–M16 for heavier rigging, gym equipment, and structural anchors; M18–M30 for industrial cable runs, heavy machinery anchoring, and high-tension catenary spans. Always apply an appropriate safety factor (typically 4:1 or greater) to your calculated working load.

In timber: thread directly into pre-drilled pilot holes or use with a nut and washer through-bolt style for maximum holding strength. In steel: use with a matching metric nut or weld a threaded plate. In concrete or masonry: these eye bolts require a threaded anchor sleeve or chemical anchor insert — they cannot be driven directly into concrete. Always ensure the substrate material and anchor method are rated for the intended load.

For a single catenary wire run or one-off installation, the 1–5 piece packs offer the most cost-effective entry point without excess stock. For workshop fit-outs, cable tray installations, or contractor use across multiple jobs, the 25, 50, or 100-piece packs reduce per-unit cost significantly. The per-piece price decreases as pack quantity increases, so bulk packs are recommended for repeat or high-volume applications.