锁紧螺母是机械部件中常用的一种锁紧零件，用来锁紧齿轮、皮带轮，及其他机械部件。
锁定螺母用于将轴承定位在轴上。 此外，它们可用于将带有圆锥孔的轴承安装到圆锥轴颈和紧定套上，以及将轴承从退卸套上拆卸下来。
Locknut is common used locking part in mechanical parts, can be used to lock gears, pulleys, and other mechanical parts.
The lock nut is used to position the bearing on the shaft. In addition, it can be used to install bearings with tapered bores on tapered journals and adapter sleeves, and to remove bearings from withdrawal sleeves.