O-Rings by Material
Fluorosilicone O-Rings (FVMQ)
Fluorosilicone combines the wide temperature range of silicone with resistance to fuels and oils — bridging the gap between VMQ and FKM for aerospace fuel systems and low-temperature chemical sealing.
Properties
Key Properties
| Property | Value |
|---|---|
| Temperature Range | −65 °C to +175 °C |
| Hardness Range | 40 to 70 Shore A (60 Shore A typical) |
| Resists | Aviation and automotive fuels, petroleum oils, di-ester lubricants, aromatic solvents (better than VMQ), ozone, UV |
| Avoid | Brake fluid (glycol-based), ketones, hot water/steam, abrasive environments — tear and abrasion resistance is low (similar to silicone) |
| Typical Applications | Aerospace fuel systems (jet fuel JP-4, JP-8), automotive fuel injection (cold climate), military vehicle fuel systems, oil & gas instrument seals |
| Available Standards | AS568, AMS 7257, AMS 7259, MIL-R-25988 |
For a complete material data sheet, see the full Fluorosilicone O-Rings material page.
Sizes
Available Sizes
FITCO manufactures Fluorosilicone O-Rings in all standard AS568 and metric sizes — from AS568-001 (0.74 mm ID) through AS568-475 (633.48 mm ID), plus metric sizes per ISO 3601, JIS B2401, and BS 1806.
- Standard durometers in stock
- Custom compounds and special durometers on request
- Cord stock available for field-cut rings
- Typical lead time: ex-stock for standard sizes, 2–4 weeks for custom
Resources
Related Pages
Full Material Data
Complete technical data sheet with chemical compatibility, compression set, and physical properties.
O-Ring Size Charts
AS568, Metric, JIS, BS, GB/T size tables with ID, OD, and cross-section dimensions.
Chemical Compatibility
Check material compatibility with your specific fluid or chemical environment.