PRECISION SEALING SINCE 1995
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Technical notes on O-ring materials, standards and failure diagnosis

Written by FITCO's application engineering team for buyers, maintenance engineers and OEM designers worldwide.

Materials · Jun 18, 2026 · 7 min read

Choosing the Right O-Ring Material: A Chemical Compatibility Framework

A practical, engineer-first framework for narrowing NBR, FKM, FFKM, EPDM, HNBR and silicone down to the right compound for your media, temperature and pressure.

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Standards · May 29, 2026 · 6 min read

AS568 vs. ISO 3601: What Actually Changes When You Switch Standards

Dash numbers and metric sizes aren't interchangeable. Here's what engineers switching between American and international O-ring standards need to check before specifying a groove.

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Technical · May 8, 2026 · 8 min read

Six O-Ring Failure Modes and What They're Telling You

Compression set, extrusion, chemical attack, spiral failure — a field guide to diagnosing a failed seal from what's left of it.

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Industry · Apr 14, 2026 · 5 min read

Sourcing O-Rings for Export Projects: A Supplier Evaluation Checklist

What procurement and technical teams sourcing internationally should verify before awarding an O-ring or sealing contract.

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