Half Coupler – 200Kg. The Hybrid HC200 is a heavy duty half-coupler suitable for temporary or permanent installations of lighting fixtures onto a 50mm diameter truss / Pole. Securing the lighting fixture onto the coupler is simple with the M10 bolt, spring washer and nut, and securing the coupler onto the 50mm truss / pole is even easier with the bolt and wing-nut foldable mechanism.