KNOTT Cast Coupling Head – 3000kg Capacity – 575005 – 50mm Ball Hitch. KNOTT Avonride Cast Coupling Head – 3000kg Capacity – 575005. Fits couplings with a 50mm dia. Supplied with 1xM14 & 1xM12 bolts, locking nuts & bolt head covers & lock. 50mm Ball Hitch for our Fuel Bowsers see MN100304. Good stocks available, please message us if this listing is showing less qty than you require. Also available to collect in person from our stores subject to availability. You can visit our premises where you can see our vast range of new and used machinery and parts. Opening Times: Monday-Friday 8.00am-4.45pm. Saturday & Sunday: Closed. Agri-Linc, Randalls Farm, Scottlethorpe Road, Edenham, Bourne, Lincs, PE10 0LN. Tel: 01778 591 225. This product is listed in multiple stores and is offered on a first-come-first-served basis.