304 Stainless Steel Ring Screws M3 - M30 Eyelets Screw Heavy Duty Lifting Bolts

Match the thread diameter to your tapped hole or nut size. For load-bearing use, also factor in the working load limit (WLL) of the specific size — larger diameters carry higher loads. As a general rule, use the smallest size that safely exceeds your maximum expected load, with an appropriate safety factor (typically 4:1 for overhead lifting).

These ring screws are machined from 304 stainless steel and feature a closed-ring head suitable for vertical and angled lifting applications. However, working load limits vary by size and installation method. Always verify the WLL for your specific size variant and apply an appropriate safety factor. Do not exceed the rated load.

304 stainless steel offers strong resistance to atmospheric corrosion, fresh water, and light salt exposure. For prolonged immersion in seawater or highly chlorinated environments, 316 stainless steel is generally recommended. For most outdoor DIY, workshop, and light marine deck applications, 304 performs reliably without surface treatment.

Yes. The closed circular ring head is designed to accept standard carabiners, snap hooks, D-shackles, S-hooks, and wire rope thimbles. Ensure the inner diameter of the ring is large enough to accommodate your hardware — ring inner diameter increases with thread size. Contact us to confirm ring dimensions for specific sizes if needed.

All sizes use standard metric coarse thread pitch (ISO 68-1). For example, M6 uses a 1.0 mm pitch, M8 uses 1.25 mm, and M10 uses 1.5 mm. This matches the most common metric nuts, inserts, and tapped holes. If your application requires fine pitch threading, please contact us before ordering.

Pack quantity availability varies by size. Larger sizes (M24, M27, M30) are currently available in 1-piece quantities. Smaller and mid-range sizes (M3–M20) are available in 1, 3, 5, 10, and 20-piece packs. Select your size first to see the available quantity options for that variant.

Thread the bolt fully into a tapped hole or through a clearance hole with a backing nut, ensuring at least 1× the thread diameter of thread engagement (more for softer materials). For in-line (vertical) loads, orient the ring plane parallel to the load direction. For angled loads, use a shoulder-pattern eye bolt with a washer and nut on both sides of the mounting surface. Torque to the appropriate specification for the thread size.