Metric Eye Bolts M3–M24 | A2 304 Stainless Steel Lifting Ring Bolts

Match the thread diameter (M3–M24) to your tapped hole or nut size. For shank length, measure the grip length — the thickness of the material being fastened — then add sufficient thread engagement (typically 1.5× the bolt diameter as a minimum). For example, an M6 bolt fastening 20mm (≈3/4") material generally needs at least 9mm of thread engagement, so M6 x 30mm is a safe starting point. When in doubt, size up.

Working load limits vary by thread size and installation method. As a general reference, M6 eye bolts typically handle around 100–150 kg vertically when fully engaged; M10 around 300–400 kg; M16 around 1,000 kg. Always derate for angled loads (loads applied at an angle to the shank axis significantly reduce capacity) and have a qualified engineer verify for any safety-critical lifting application.

Yes, in most cases. A2 (304) stainless steel offers good corrosion resistance in general outdoor, humid, and light marine environments. For highly aggressive saltwater exposure or chemical environments, A4 (316) stainless is generally recommended. These bolts are well-suited for garden structures, covered boat fittings, workshop installations, and inland waterway applications.

These use ISO metric coarse thread — the most common metric standard worldwide. Typical pitches: M6 = 1.0mm, M8 = 1.25mm, M10 = 1.5mm, M12 = 1.75mm, M16 = 2.0mm. They are compatible with standard metric nuts, lock nuts, and tapped holes. They are not compatible with UNC or UNF inch-thread fittings.

These eye bolts are designed for lifting and rigging when installed correctly — fully threaded in, flush to the bearing surface, with a nut and washer where applicable. For certified or regulated lifting operations, always verify the working load limit for your specific size and consult applicable safety standards (e.g., ASME B30.26 in the US). Do not use for overhead lifting without confirming load ratings.

Choose 1 pc for a single anchor point or to test fit before committing to a larger order. The 5-pack suits most DIY projects requiring multiple attachment points — for example, a 4-point hammock or pulley system with a spare. The 10-pack offers the best per-unit value for larger rigging setups, workshop installations, or when you want extras on hand for future repairs.

A2 (304 grade) is the most widely used stainless steel — it resists rust and oxidation well in general outdoor and light marine conditions. A4 (316 grade) adds molybdenum, giving it superior resistance to chlorides and direct saltwater exposure. For most DIY, construction, and inland marine uses, A2 is sufficient and more cost-effective.