O-Rings

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Brass Stainless steel Zinc alloy
12 mm 15 mm 20 mm 25 mm 26 mm 30 mm 32 mm 35 mm 40 mm 45 mm 50 mm
Welded O-Rings
Not sure about your choice? Our advisor will help. For each parameter we explain what it means and how to choose the right one. Help me choose

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Snappy advises

O-Rings – what to choose?

The welded O-rings in our range have high tensile strength and do not deform. They are mainly made from nickel-plated steel. For heavy-duty products, we recommend stainless steel O-rings or cast brass O-rings. An alternative is plastic O-rings.

Guides & articles

O-Rings

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Material

Brass Stainless steel Zinc alloy

Inner ø

12 mm 15 mm 20 mm 25 mm 26 mm 30 mm 32 mm 35 mm 40 mm 45 mm 50 mm

Construction

Welded O-Rings

Prefer to choose for yourself? Set up the filter exactly to your needs.

Detailed filter

Parameter guide

What the parameters mean and how to choose the right values.

The clear inner diameter of the eye, that is the size of the opening something passes through. Rings are paired with a snap hook, webbing or chain by this figure: the mating part has to pass whole, not just its tip. The outer size of the piece is this diameter plus twice the material thickness.

The diameter of the round stock the piece is bent or formed from. Thicker stock takes more load, but eats more room in the slot and prints through more under the webbing. The outer size is the inner dimension plus twice this diameter.

Frequently asked questions

The most common questions – materials, selection and practical tips.

Tarnishing of brass is caused by oxidation — a natural chemical process that cannot be completely prevented. Certain substances (chemicals from tanned leather, sweat, grease) accelerate it.

How to address it:

  • Remove the oxidized layer — using the brass cleaner Sitol.

  • Protect the surface — if you want to preserve the shine of polished metal, apply a thin layer of transparent protective varnish by brush, dipping, or spraying.

The cleaning and polishing process is shown in our video.

The value indicates the load at which the product breaks in a direct-pull test. It serves as a reference figure for selection — not as a guarantee.

How we measure. For each product type we test 2–3 pieces on our own equipment, which is neither certified nor calibrated. Variance between pieces of the same type can be up to 20% — steel products tend to have less variance than cast zinc products.

How to use the value:

  • Safe load = 1/10 of the breaking load. For a 25 kg dog, choose a carabiner rated above 250 kg.

  • Collars and martingales — for buckles, slide buckles, and martingale chains used on collars, the actual pull forces are half of the test value, so you can count on a doubled safety margin.

  • Other use — if you use buckles or chains outside of a collar (e.g., as a connector between two fixed points without the possibility of load distribution), the half-force bonus does not apply.

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