643 X 8 V

• FKM (Fluorocarbon)
• Standard Service Temperature: -20°F - +400°F

Color Compounds: Green, Brown, Black

Excellent resistance to petroleum products, low compression set and high temperature resistance. The low temperature capability is somewhat restricted, however, in some cases the low temperature sealing capability may be increased by specific design parameters.

May be suitable for Petroleum Fluids, Diester Lubricants, Silicone Fluids, Halogenated Hydrocarbons (Above 212°F), Some Acids, Selected Fluids.

Not Compatible With: Skydrol, Amines, Ketones, Hot Water, Steam, Brake Fluids

Shore A Description:

The hardness of rubber compounds is measured by the Shore A durometer; the higher the durometer, the harder the compound. Softer compounds stretch easier and seal better on rough surfaces. Harder compounds offer greater abrasion resistance and resistance to extrusion.

• 60 Shore A is softer than 70
• 70 Shore A is the standard
• 90 Short A is very stiff