Flange Head Wood Expansion Screws

Flange Head Wood Expansion Screws is to use the wedge Angle to promote the expansion to produce friction gripping force, to achieve the fixing effect. The screw is threaded at one end and tapered at the other. The outer bread is a tin (some steel pipe), the tin cylinder (steel pipe) half has a number of notches, put them together into the wall hole, and then lock the nut, the nut pulls the screw outward, the taper pulls into the tin cylinder, the tin cylinder is opened, so tightly fixed on the wall, generally used for guardrail, awning, air conditioning and so on cement, brick and other materials. Flange Head Wood Expansion Screws consists of a screw and an expansion tube. The tail of the screw is a cone, and the inner diameter of the cone is larger than the inner diameter of the expansion tube. When the nut is tightened, the screw moves outward, and the cone part moves through the axial movement of the thread, and then forms a great positive pressure on the outer surface of the expansion tube, and the Angle of the cone is very small, so that the friction between the wall, the expansion tube and the cone is self-locking, and then achieves the fixing effect.

The spring washer on the Flange Head Wood Expansion Screws is a standard part. Because its opening is staggered and elastic, it is called the spring washer. The purpose of the spring washer is to use the sharp Angle of the opening to drive into the nut and the flat pad to prevent the nut from loosening.

The flat washer is also a standard part. Its function is to distribute the pressure of the nut evenly across the connected parts.

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