The problem of the sliding wire of the screw, will the screw 316 appear? After many inquiries, the editor may tell you that the problem of the sliding wire of the screw is related to many aspects, not only the material problem. Non-standard screws are divided into three parts, namely size, mechanical properties and surface defects. The specific inspection items of each part have different regulations according to different products. 316 is a little softer than the rest, not so easy to break or corrode, and it can be partially avoided in terms of silkiness.

The important influencing factors are the scene of screw use, the method of use, and the number of times of use. For screw customization, for example, the dimension inspection items for hexagonal nuts are specified as thread general gauge, thread stop gauge, thread minor diameter, opposite side width, diagonal dimension, nut height, and the perpendicularity of the nut bearing surface and the thread axis; while the flat washer is specified as the inner diameter , outer diameter, thickness, coaxiality of the outer circle to the inner hole and flatness, etc. For the mechanical performance inspection items, hardness and tensile strength are specified for hexagonal nuts, while only hardness is specified for flat washers. Non-standard screws are divided into three parts, namely size, mechanical properties and surface defects. The specific inspection items of each part have different regulations according to different products. If the screw is used in a situation where the force is relatively large or the environment is relatively brutal, it will easily cause damage to the screw, and the rate of slippage will increase. The use method refers to how the screw is screwed in, for example, whether it is screwed by hand, electric or self-tapping, etc., or when screwing in, the thread is crooked and the diameter of the thread does not match well, which will cause the thread to be screwed. loss. The number of uses, as the name suggests, is the number of times the screws are reused. The more screws are reused, the more serious the damage will be.

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