Slotted flat washer

The utility model discloses a slotted flat washer which is used for being installed between a bolt head and a first component and between a nut and a second component, the first component and the second component are respectively provided with a bolt hole for a bolt to penetrate through, a cavity is formed between the bolt hole and the bolt, and the slotted flat washer comprises a flat washer base body in a closed ring shape. A flat washer supporting part is arranged on one side of the flat washer base body part, and a plurality of circulation grooves used for communicating the cavity with the atmosphere are formed in the flat washer supporting part in the circumferential direction. According to the utility model, contamination caused by material accumulation in the cavity formed between the bolt and the bolt hole of the component can be avoided. 本实用新型公开了一种开槽的平垫圈，用于安装在螺栓头部与第一部件之间以及螺母与第二部件之间，所述第一部件和第二部件上分别开设有一个供螺栓穿过的螺栓孔，所述螺栓孔与螺栓之间形成空腔，包括呈闭环形状的平垫圈基体部，所述平垫圈基体部的一侧设有平垫圈支撑部，平垫圈支撑部上沿周向开设有多个用于连通所述空腔与大气的流通槽。本实用新型能够避免螺