Alko AK-161 50mm ball coupling.
The AK-161 (1730219) replaces the AK-160 (247163)
Designed to fit a 50mm round shaft, bolt holes on the side are to suit 47mm to 54mm centres and the front hole is elongated.
Commonly fitted to European caravans and compressor trailers.
Maximum capacity: 1600Kg
Maximum ball weight: 120Kg
Mounting hole centres: 47-54mm
Mounting hole diameter: 12mm
Shaft width: 50mm
Shaft shape: Round