A2 304 Stainless Steel Lifting Eye Bolt — Metric M3 to M20, Rigging & Lifting Screw Eye

Match the bolt diameter (M3, M4, M5, etc.) to your threaded hole or nut size. For shank length, choose one long enough to engage at least 1.5x the bolt diameter in thread depth — for example, an M8 bolt should typically thread in at least 12mm (approx. 1/2 in). As a quick reference: M6 x 12mm suits thin panels, while M10 x 30mm (approx. 1-3/16 in) works for thicker structural members. If unsure, measure your existing hardware or contact us to confirm.

Working load limits vary by size and how the load is applied. As a general reference, M6 eye bolts typically handle around 100–150 kg (220–330 lbs) in a straight vertical pull, while M12 bolts can generally support 500–700 kg (1,100–1,540 lbs). Always apply an appropriate safety factor and never exceed the rated WLL. Angled loads reduce capacity significantly — consult a rigging professional for critical applications.

Yes. A2 304 stainless steel offers strong resistance to rust, salt spray, and moisture, making these bolts well-suited for outdoor, coastal, and general marine environments. For highly aggressive saltwater immersion or chlorinated environments, A4 316 stainless is generally recommended. For most outdoor and light marine rigging applications, A2 304 performs reliably.

These eye bolts use standard metric coarse threads (ISO 261 / DIN 580 compatible), which are the most common pitch for metric fasteners. They thread directly into standard metric nuts, threaded inserts, and tapped holes of the same nominal diameter. They are not compatible with UNC/UNF inch threads.

These eye bolts are designed for lifting and rigging use. For overhead lifting, ensure the bolt is fully threaded into a load-bearing surface with adequate thread engagement, use a straight vertical pull whenever possible, and apply a safety factor appropriate to your application. Angled loads — even at 45° — can reduce the safe working load by 30% or more. For critical overhead lifts, consult a qualified rigging engineer.

The Qty(pcs) option lets you choose 1 or 2 pieces per order. Select 2 pcs if you need a matched pair — for example, to rig both ends of a cable, hang a swing, or balance a suspended load. For a single anchor point, 1 pc is sufficient. Larger sizes (M8 and above) are available in 1 pc increments, while smaller sizes are listed in 2 pc sets.

Yes — the open ring design is compatible with wire rope loops, chain links, shackles, and carabiners, provided the connecting hardware fits through the eye opening. The inner diameter of the ring varies by bolt size. If you're connecting specific rigging hardware, contact us with your bolt size and hardware dimensions to confirm compatibility before ordering.