BS EN 3049:2025

This standard BS EN 3049:2025 Aerospace series — O-rings, in fluorocarbon rubber (FKM), low compression set — Hardness 80 IRHD is classified in these ICS categories:

• 49.080 Aerospace fluid systems and components

This document specifies the characteristics of O-rings in fluorocarbon rubber (FKM), low compression set, hardness 80 IRHD, for aerospace applications. They are intended to be used in air, mineral / synthetic oil and fuel systems. Operating conditions - Temperature: a) Continuous operation: −20 °C to +225 °C; b) Static applications minimum temperature of use: −50 °C. Limitation: not used with phosphoric ester type hydraulic fluids (permanent or temporary immersion).