凸出翼结构的采用比普通螺母增加了金属与金属间的接触面，起到楔入紧固的作用，防盗性能更卓越。
Compared with the common nut, a contact surface between metals is added by adopting the protruded wing structure, plays a role of wedging and fastening and has more excellent theftproof performance.
所述螺母为一圆锥体与通体光滑圆柱体连接成的凸型体，在圆锥体上至少有一个凸出翼。
The nut is of a convex body formed by connecting a cone and the integrally-smooth cylinder, and the cone is at least provided with a protruded wing.
蝶形螺母是一种翼状物的螺母。
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