304 Stainless Steel Eye Bolts M3–M6 | Lifting Eye Screws with O-Ring Loop

Match the thread diameter (M3, M4, M5, or M6) to your tapped hole or nut size. For shank length, the threaded portion should engage at least 1.5× the bolt diameter into the material — for example, an M6 bolt typically needs at least 9mm of thread engagement. Longer shanks (e.g., 50mm–200mm / ≈2"–7.9") are used when passing through thick panels or structural members. If you're threading into wood, go longer to maximize pull-out resistance.

Working load limits vary by size and installation angle. Generally, an M6 eye bolt in vertical (axial) loading can handle a working load of approximately 50–80 kg, while M3 is suited for lighter loads typically under 10 kg. Always apply a safety factor of at least 4:1 and never exceed the rated WLL. Contact us to confirm load ratings for your specific size and application before use in safety-critical lifting.

Yes — 304 stainless steel offers good corrosion resistance in most outdoor and mildly marine environments. For highly aggressive saltwater immersion or chemical exposure, 316 stainless steel is generally recommended. For typical outdoor DIY, garden structures, or light marine rigging above the waterline, 304 SS performs well without rusting or staining under normal conditions.

These eye bolts use standard ISO metric coarse threads: M3×0.5, M4×0.7, M5×0.8, and M6×1.0. They are fully compatible with standard metric hex nuts, wing nuts, threaded inserts, T-nuts, and tapped holes following ISO 68-1 specifications. No special tools or adapters are required — they work with any standard metric hardware you already have.

Eye bolts without a shoulder (plain shank style) are generally designed for in-line (vertical/axial) loading only. When side loading or angular loading is required, a shouldered eye bolt or swivel hoist ring is typically recommended. If you must use these at an angle, reduce the working load significantly — typically by 50% or more at 45° and by up to 75% at 90° side load. Always consult a rigging professional for safety-critical applications.

The closed O-ring loop accepts a wide range of hardware: snap hooks, carabiners, shackles, wire rope clips, chain links, bungee cord hooks, and paracord. The inner diameter of the loop varies by M-size — generally ranging from approximately 10mm to 20mm depending on the size selected. Check the variant you're ordering if you need a specific minimum loop opening for your hardware.

We offer flexible pack quantities: 1, 2, 3, 5, 8, 10, or 25 pieces. For a single repair or prototype, a 1-pc or 2-pc pack is ideal. For rigging kits, production runs, or bulk DIY projects, the 10-pc or 25-pc packs offer better value per piece. Mix and match sizes — each size/length combination is available in all pack quantities.