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The invention belongs to the technical field of sealing parts, in particular to a thrust washer; Including metal rings; The metal ring is provided with a spiral groove on the end face in contact with the bolt end, and the spiral groove is provided with more than one spiral circle on the surface of the metal ring, and an oil storage chamber is provided on the side wall of the inner ring of the metal ring; One end of the oil storage chamber is connected with the side wall of the inner ring of the metal ring, and the other end is connected with the bottom of the minimum diameter of the spiral groove; When bolts and nuts need to be connected in machining, the thrust washer is set between the bolt and nut. In the process of gradual tightening of the bolt, lubricating oil is applied to the contact point of the bolt and nut to reduce the force during tightening. The lubricating oil will flow in the spiral groove and the oil storage chamber, so that the lubricating oil is distributed more evenly on the surface of the thrust washer. Thus, the lubrication effect of the lubricating oil is enhanced, making the rotation of the bolt in the nut more convenient and the resistance is less.