Screw Structure
A screw is a fastener composed of multiple parts. Generally, a screw's structure includes the screw shaft, nut, washer, and retaining ring. Below, we will introduce the function and characteristics of each part.
Screw Shaft
The screw shaft is the main body of the screw and an important component of the fastener. It is generally made of metal materials such as steel or copper, possessing a certain degree of hardness and corrosion resistance. The function of the screw shaft is to rotate and penetrate into the material to be fastened, firmly fixing the material together through friction and tensile force.
Nut
The nut is a fastener that matches the screw shaft. Generally, the nut is made of the same material as the screw shaft. The function of the nut is to adjust, tighten, and transmit fixing force on the screw shaft, making it an indispensable part of the screw tightening process.
Washer
The washer is a spacer located between the nut and the material to be fastened. Generally, the washer is made of the same material as the screw shaft and nut, but it can also be made of plastic. The function of the washer is to increase the tightening area, distribute pressure, prevent the nut from exerting excessive pressure on the material to be fastened, thereby reducing damage to the material surface.
Snap ring
A snap ring is an elastic element primarily used to fix the position of a nut or prevent it from loosening. Snap rings are typically made of elastic steel, which has excellent corrosion resistance and elasticity. The function of the snap ring is to generate elastic deformation between the screw and the nut, increasing the loosening force and fixing the nut in its tightened position, thereby preventing it from loosening.
