Match the thread diameter to your tapped hole or nut size. For shank length, the threaded portion should generally engage at least 1.5× the bolt diameter into the material — for example, an M12 bolt typically needs at least 18mm (≈3/4") of thread engagement for a secure hold. Lengths in this listing range from 20mm (≈3/4") to 50mm (≈2") depending on the diameter selected. When in doubt, choose a longer shank for greater pull-out resistance.

Working load limits vary by size and are rated for straight (vertical) pulls. As a general reference: M12 eye bolts typically handle around 0.32–0.5 tonnes WLL, M16 around 0.63–1.0 tonne, M20 around 1.0–1.6 tonnes, and M24 around 1.6–2.5 tonnes. Always derate significantly for angled loads. Contact us to confirm the rated capacity for your specific application before use.

Yes — A2 stainless steel (304 SS) offers good corrosion resistance for most outdoor applications, including light marine exposure such as covered docks or coastal workshops. For highly aggressive saltwater immersion or chemical environments, A4 (316 SS) is generally the better choice. These bolts are well-suited for outdoor rigging, garden structures, and sheltered marine use.

These use standard metric coarse thread (ISO 68-1), compatible with any standard metric nut or tapped hole of the matching diameter. M12 uses a 1.75mm pitch, M16 uses 2.0mm, M20 uses 2.5mm, and M24 uses 3.0mm — all widely available metric coarse thread specifications. They are not compatible with UNC/UNF inch threads.

Choose based on your load requirements and the thread size already in your application. M12 is suitable for lighter rigging, hanging fixtures, and general workshop use. M16 and M18 handle medium loads and are common in fabrication and construction. M20 and M24 are designed for heavier structural and industrial lifting. Always match the bolt diameter to your pre-drilled or tapped hole — never force a larger bolt into an undersized hole.

Lifting eye bolts are generally rated for straight (vertical) pulls only. For angled loads, the working load limit is typically reduced significantly — in most cases by 50% or more at 45°, and further at shallower angles. For frequent side-loading or multi-directional rigging, a swivel hoist ring is generally the safer option. Always consult a load angle derating chart for your specific application.

Each pack contains eye bolts only — 1, 2, 3, or 4 pieces depending on your selected quantity. Nuts and washers are not included. Standard metric coarse-thread nuts and flat washers of the matching size are widely available at hardware stores and can be sourced separately.