MP84 Combined ball & pin hitch is commonly fitted to commercial vehicles to allow for the attachment of hitch or towing eye trailers. This product is a direct equivalent to MP82 with identical approved load capacities. UN/ECE Regulation 55 has been introduced to replace EC94/20 towbar regulation. Regulation 55 is fundamentally similar to EC94/20 but with additional test and administration requirements. All Maypole towballs and ball & pin hitches are approved to Reg 55. Fitting instructions for 50mm Ball & Pin Hitch: Use BS3692 grade 8.8 M16 bolts and class 8 nuts with lock washers tighten to 240Nm.