Threaded sleeves are very common in structural assembly, and are often used in forgings, castings and machined parts. Especially when the threaded holes cannot provide enough thread shearing area, and the self-locking device cannot be used, the built-in threaded sleeve is a very effective s solution... read more
The main problems of high-strength fastener products are as follows: (1) Guaranteed load, wedge load is unqualified. Guaranteed load and wedge load are the key items for evaluating the mechanical properties of the product under tensile load (Class A), which is especially important for high-strength ... read more
Phosphating is a process of forming a phosphate chemical conversion film by chemical and electrochemical reactions. The phosphate conversion film formed is called a phosphate film. The main purpose of phosphating is to provide protection to the base metal and prevent the metal from being corroded to... read more
The expansion screw is composed of a screw and an expansion tube. The tail of the screw is cone-shaped, 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 outwards, and the conical part moves through the axial moveme... read more
The screw wire needs to be processed before it can be put into screw production. The following briefly introduces the pickling and drawing process of the screw wire. The purpose of pickling is to remove the oxide film on the wire surface and form a layer of phosphate film on the metal surface to red... read more
Yuyao Xintai Hardware Co., Ltd. was founded in 2005, which is a professional China construction anchor bolts manufacturers and concrete anchor bolts factory,our company engaged in various kinds of expansion bolt,high strength fasteners. We are near to Hang Zhou Bay, and cover 7000 square meters.
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