Stainless Steel O-Rings (Round Rings), 4–13 mm Thickness

These stainless steel O-rings are a universally handy rigging component for all marine purposes – from sailing yachts to industrial maritime use. Crafted from high-strength 316 stainless steel, they offer superb resistance to saltwater corrosion, making them ideal for permanent outdoor use (on deck fittings, railings, or even underwater). Each ring is fully welded (closed seam), ensuring there are no weak points – the material’s strength is consistent around the entire circle. This robust design allows the rings to take extremely high tensile loads without risk of opening or breaking.

Sizes & Load Capacity: Several size options cover different needs: the smallest model (code 00313-1) has a 35 mm inner diameter and 4 mm bar thickness – perfect for light-duty tasks on small boats, thinner ropes, and applications with minor loads. The intermediate models (6 mm, 8 mm, 10 mm thickness) have ~40–60 mm diameters and suit medium loads, such as lashing gear, tensioning tarps, or rigging on mid-size sailboats (e.g. sheets and downhauls). The largest model (code 00313-10) boasts a hefty 160 mm inner diameter with 13 mm thickness – designed for heavy-duty work like mooring large yachts, securing anchoring systems, lifting slings, and other scenarios requiring maximum strength. While exact safe working loads depend on usage, a 13 mm stainless ring can typically handle several tons of pull, making it a reliable choice for critical connections.

Onboard Applications: Stainless round rings have countless uses in the marine environment. On sailboats, they are often used to guide and attach lines – for example, as tie-off points for sail controls, for securing the bitter end of sheets, or as loops for spinnaker pole guys. In modern rigging they can serve as simple low-friction rings in lieu of blocks – with no moving parts, these light smooth rings can redirect a halyard or act as an outhaul fairlead with minimal weight aloft. For mooring, rings allow rope-to-rope or rope-to-chain connections – e.g. a stainless ring fixed to a pontoon or dock line can let a mooring rope run through it more smoothly, reducing chafe and making adjustments easier. In anchoring setups, a large ring can be used on an anchor buoy: the buoy’s line passes through the ring, which distributes the load from boats pulling on it. Rings are also handy for securing and stowing equipment – you can quickly link straps, clips or chains through a ring when tying down cargo on deck or towing small vessels, providing a strong and convenient attachment point.

In watersports and diving, stainless rings are valued for their rustproof nature – used in making harnesses, slings, and spearfishing gear where saltwater would otherwise ruin regular metal. For instance, divers employ rings to attach marker buoys or as part of dive harnesses, since the smooth round shape prevents snagging. In industrial settings (such as commercial fishing or cargo handling), these rings serve to join ropes and nets, standing up to rough use and heavy loads.

Maintenance of stainless rings is minimal – an occasional rinse with fresh water to remove salt and a quick check for any wear is all that’s needed. The polished inox finish requires no coating and stays shiny for years. By investing in quality stainless steel rings, you ensure reliability and versatility – these are the small components that can “save the day” in countless situations on a boat, from emergency fixes to everyday tie-downs.