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  • What are the applications of threaded sleeves?

    What are the applications of threaded sleeves?

    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

    Oct 15,2021 Industry News
  • What are the main problems of high-strength fastener products?

    What are the main problems of high-strength fastener products?

    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

    Oct 08,2021 Industry News
  • What is the difference between blackening of screws and phosphating?

    What is the difference between blackening of screws and phosphating?

    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

    Sep 30,2021 Industry News
  • How to install expansion bolts?

    How to install expansion bolts?

    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

    Sep 24,2021 Industry News
  • The pickling and drawing process of screw wire

    The pickling and drawing process of screw wire

    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

    Sep 14,2021 Industry News
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