Overall Description
| Name | Steel Pan Head Machine Screws |
| Measurement | M3.5/custom made |
| Item material | Carbon steel with good quality |
| Surface | Black zinc plating, etc |
| Feature | With washer |
| Drive type | Phillips, etc |
| Head style | Pan head |
| Application | electronic, digital products, etc |
Steel Pan Head Machine Screws Details
Steel Pan Head Machine Screws Application
Steel Pan Head Machine Screws Production Flow
The surface treatment of fasteners refers to the process of forming a cover layer on the surface of the fastener by some methods. After the surface treatment of the fastener, the appearance of the fastener can be more beautiful, and the fastener itself is corrosion-resistant. The ability will also improve. There are several methods for surface treatment of fasteners.
1. Electroplating of fasteners
The plating of fasteners generally includes galvanizing, copper, nickel, chromium, copper-nickel alloy, and so on.
2. Hot dip galvanizing of fasteners
The hot dip galvanizing of the fastener is to immerse the carbon steel component fastener into the plating bath of the molten zinc having a heat of about 510 ° C, so that the iron-zinc alloy on the surface of the fastener is converted into passivated zinc, thereby to get a surface treatment effect.
3. Mechanical plating of fasteners
Mechanical plating of fasteners means that the surface of the fastener is impacted by a specific physical and chemical with a powder of coated metal, so that the coated metal forms a coating on the surface of the fastener by cold welding. Mechanical plating of fasteners is mainly suitable for spare parts such as screws, nuts and gaskets.
The main purpose of the fastener surface treatment is to make the fastener itself corrosion-resistant to increase the reliability and adaptability. Therefore, the quality judgment of the surface treatment of the fastener is mainly to check whether the corrosion resistance of the fastener is effectively increased, and whether the increase is in line with the expected requirements.
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Type 302 is used for machined screws and self-tapping bolts.
Model 303 In order to improve the cutting performance, a small amount of sulfur is added to the Type 303 stainless steel for the processing of nuts with bar stock.
Type 304 is suitable for machining stainless steel screws with a hot plating process, such as longer gauge bolts and larger diameter bolts, which may exceed the range of the cold heading process.
Type 305 is suitable for machining stainless steel screws with cold heading, such as cold formed nuts and hexagon bolts.
Types 309 and 310, which have higher Cr content and Ni content than 18-8 stainless steel, are suitable for stainless steel screws working at high temperatures.
Thread is a common connection method in mechanical engineering. As a basic and necessary element in mechanical design, the majority of designers must thoroughly study and master the thread, not only to correctly and reasonably select the thread, but also to understand Thread processing methods and processes to solve problems that may be encountered in production.