Bush bearing housing 0511393030 are widely used in automobile non - independent suspension. The leaf spring is composed of a number of alloy spring steel sheets of different lengths superimposed to form an elastic beam of approximately equal strength. The longest piece called the master piece is rolled into lugs at both ends and is fitted with bushings which are hinged with a spring pin to a bracket or lug fixed to the frame. Each bush piece is connected with a center bolt and ensure the relative position of each piece. The distance between the center bolt and the center of the lug at both ends can be equal called symmetric leaf spring; They can also be unequal called asymmetrical leaf springs. In order to prevent the car in the driving process of the spring separate in the leaf spring is equipped with a number of spring clips so as to avoid the main piece alone bearing. The spring clamp is connected with the bottom spring sheet by rivets and both sides of the spring clamp are connected by bolts. The bolts are provided with bushing and the nut is required to face the tire when assembling so as not to scratch the tire when the bolt falls off or even to fly and collapse.