Generally, the bolt shank should provide at least 1.5× the bolt diameter in thread engagement depth. For example, an M16 bolt typically needs at least 24mm of thread engagement into the tapped hole. If you're bolting through a plate, measure the plate thickness and add the required engagement. Lengths on this listing range from 50mm (≈2") to 300mm (≈11.8") to cover most structural and rigging applications.

Working load limits vary by diameter and the angle of the applied load. In-line (0°) loads generally allow the highest WLL, while angular loads reduce capacity significantly — in some cases by 50% or more at 45°. For precise WLL values for your size, contact us to confirm. Always apply an appropriate safety factor for overhead lifting applications.

Yes. A2 Grade 304 stainless steel provides solid corrosion resistance in most outdoor environments, including coastal and lightly marine settings. For continuous saltwater immersion or chlorinated pool environments, A4 Grade 316 stainless steel is generally recommended instead, as it offers superior chloride resistance.

These use standard ISO metric coarse threads (M16, M18, M20, M22, M24). They are not compatible with UNC or UNF inch-thread fasteners. Before ordering, confirm that your tapped hole or mating nut is metric and matches the coarse pitch for the selected diameter.

Yes — the eye bolt and eye nut in the same diameter are thread-compatible and can be used together as a through-bolt assembly. A common configuration is threading the eye bolt through a structural member and securing it with the matching eye nut on the opposite side, giving you two attachment loops for rigging hardware.

In most cases, a standard wrench or spanner (or a pin through the eye loop) is sufficient. For torque-critical overhead lifting applications, a calibrated torque wrench is recommended to achieve proper clamping force without over-stressing the threads. Always follow applicable rigging standards for your region.

Match the diameter to your existing tapped hole or mating nut. If you're designing a new connection, select the diameter based on the required load capacity — larger diameters generally support higher loads. M16 and M18 are common for medium-duty rigging and structural anchoring; M20–M24 are typically used in heavier industrial lifting and construction applications.