This standard specifies the characteristics, qualification and acceptance requirements for O-rings in fluorosilicone rubber FVMQ to EN 3825, EN 3826 and EN 3827.
BS EN 3747:2003 history
2007BS EN 3747:2007 Aerospace series - O-rings, in fluorosilicone rubber (FVMQ) - Technical specification
2003BS EN 3747:2003 Aerospace series - O-rings, in fluorosilicone rubber (FVMQ) - Technical specification