O-Ring Seals are selected when an assembly calls for containing fluid or excluding contamination at a static or dynamic interface. This application guide to the ISO / DIN type covers concrete end-uses, the specification checklist, correct installation, and where an alternative fastener performs better. Stocked across roughly 5 mm to 100 mm, they cover general to heavy-duty work.
Typical Applications for O-Ring Seal — ISO / DIN (Series 159)
The most common settings where these are specified:
- General machine building: fastening covers, brackets, motors and sub-assemblies on production equipment.
- Maintenance & repair (MRO): a stocked size for servicing existing plant where the original fastener spec must be matched.
- Fabrication & metalwork: bench and on-site assembly of steel frames, enclosures and weldments.
How to Specify O-Ring Seal — ISO / DIN (Series 159) for Your Application
- Size: Select on inside diameter, and confirm it against the mating feature in the assembly. This product spans 5 mm–100 mm; check the full table below for the exact dimensions of each size.
- Material: Choose the material and finish for the service environment — plated steel for general use, stainless for corrosion resistance.
- Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
- Standard: This product is supplied to ISO / DIN. Quoting the standard on your order guarantees interchangeable dimensions between suppliers.
Where O-Ring Seal — ISO / DIN (Series 159) Are Not the Right Choice
Match the fastener to the load, environment and whether the joint must be reopened; the wrong class or style is the usual cause of joint failure.
