Tub pin connector plug known, tub pin is composed of train transport all kinds tub indispensable accessories. Mine car pin by pin holes and link tub on multiple vehicles Harvesters group train by locomotive or traction winch on orbit. Mine car pin and lock ring group on the vehicle as a whole, together constitute the locking device, so as to ensure the safety of train operation, avoid jumping pin accidents. I produced mine car pin diameter of 38mm and 40mm main two kinds. Our company specializes in the production of coal mining equipment for decades, has extensive experience in mine production equipment, abundant coal mining equipment company, the production of fixed tub, tipping bucket, tub, mine Wheel, tub seats and other accessories complete, welcome to buy !