Washers for unified hexagons for aircraft (primarily for facing purposes) has-tracked-changes BS EN 1206 discusses chemicals

BS EN 1206 discusses chemicals used for the treatment of water intended for human consumption

The pendulum method (only suitable for testing bollards at lower energy levels)

as well as fire detection and suppression

BS EN 61000-4-4 on electromagnetic compatibility is useful for:

Washers for unified hexagons for aircraft (primarily for facing purposes) has-tracked-changes BS EN 1206 discusses chemicals1 Scope These British Standards specify the materials, dimensions and finish of cold rolled carbon steel and corrosion resisting steel washers suitable for use with bolts and nuts with Unified hexagons for aircraft. The washers are intended primarily for use for facing purposes.