GB901/stud bolt
The information of GB901 is as follows:
diameter:Â Â 6Â 8Â 10Â 12Â 14Â 16Â 18Â 20Â Â 24
length:Â Â 40Â 45Â 50
material:Â Â 304Â Â 316Â Â Â Â carbon steel
thread form:  Coarse thread    and  so on
surface finishing:  natural     coating    black    galvanizing    Dacromet coating  and so on
  1. Classification by material for GB901
The equal-length stud bolts in GB901 standard can be classified by material as follows:https://pangjinfasteners.com/about-us.html
– Carbon Steel: Such as Q235, 35#, 45#, etc. Q235 has relatively low strength and is often used in occasions where the strength requirement is not high. After appropriate heat treatment, 35# and 45# can obtain good comprehensive mechanical properties and are widely applied.
– Alloy Steel: Such as 40Cr, 35CrMoA, 25Cr2MoV, etc. 40Cr has good strength and toughness and is suitable for occasions with medium strength requirements. 35CrMoA has high strength, toughness and fatigue strength, and is often used in occasions that bear heavy loads and impact loads.
– Stainless Steel: Such as 304, 304L, 316, 316L, etc. 304 has good corrosion resistance and comprehensive properties and is widely used. The corrosion resistance of 316 is better than that of 304, especially in terms of seawater corrosion resistance and pitting corrosion resistance, and it is suitable for harsh corrosive environments.
 2.Classification of GB 901 according to surface treatment    Â
The equal-length stud bolts specified in GB901 can be classified according to surface treatment as follows:
1. Blackening treatment: Through chemical or heat treatment methods, a black oxide film is formed on the surface of the stud bolt, which can improve its wear resistance and corrosion resistance to a certain extent. It is suitable for indoor environments where the requirement for corrosion resistance is not high.
2. Galvanizing treatment: This includes electro-galvanizing and hot-dip galvanizing. The electro-galvanized layer is relatively thin and has a lower cost, providing good anti-corrosion performance in general environments. The hot-dip galvanized layer is thicker and has better anti-corrosion performance, making it suitable for harsh corrosive environments such as outdoors and humid areas.
3. Nickel plating treatment: It can endow the surface of the stud bolt with good wear resistance, corrosion resistance, and an aesthetic appearance. It is often used in occasions where high requirements are placed on surface quality and anti-corrosion performance.
4. Cadmium plating treatment: The cadmium-plated layer has good corrosion resistance and lubricity. However, since cadmium is a heavy metal that is harmful to the environment and human beings, its application is somewhat limited.
5. Dacromet treatment: It is a zinc-chromium coating with excellent corrosion resistance, high-temperature resistance, and the absence of hydrogen embrittlement. It is suitable for high-strength fasteners and can be used for a long time in harsh environments.
6. Coating with fluoropolymer coating: Such as Teflon coating, which has an extremely low coefficient of friction, good corrosion resistance, and non-stick properties. It can be used in occasions where reducing friction or preventing adhesion is required.
1. About package
1.1 In our daily production operations, we always maintain a rigorous and scientific attitude towards the product packaging process. When it comes to selecting materials for the inner packaging of products, we typically use plastic films, plastic bags, or plastic trays. Thanks to their excellent sealing properties and corrosion resistance, these materials can effectively protect products and perform the functions of moisture prevention and rust prevention remarkably well. Especially for those fastener products with high manufacturing precision or those that are relatively fragile and vulnerable, we will additionally use cushioning materials with excellent shock absorption performance, such as foam plastics and sponges, to further enhance the protection. In this way, we can avoid product damage caused by various collisions and jolts during transportation, ensuring the integrity and quality of products to the greatest extent. Regarding the outer packaging, we usually choose corrugated cardboard boxes, wooden cases, or plywood cases. Corrugated cardboard boxes are lightweight and cost-effective, making them suitable for fasteners with relatively light weights. Wooden cases and plywood cases have high strength, which not only allows them to bear heavier loads but also enables them to meet the fumigation requirements for export packaging, making them ideal for heavy-duty or vulnerable fasteners.
1.2 In addition, we attach great importance to the personalized needs of each customer and are committed to providing customized packaging services. If customers have unique design requirements for the color, pattern, and size of the packaging, or if they expect to print exclusive brand logos on the packaging to enhance their brand image, we will go all out, mobilize various resources of the company, and make every effort to meet each special requirement of the customers. We strive to create unique packaging solutions for customers that are in line with their brand concepts and market positioning.
2.About payment
Our company uniformly adopts T/T (Telegraphic Transfer) as the payment method. For regular orders, a 30% advance payment is required at the time of placing the order to initiate the order process. The remaining 70% balance must be fully settled before the goods are loaded onto the vehicle to ensure a seamless connection between the payment transfer and the goods transportation process.
In the case of customized products, considering the particularity of their production, the advance payment proportion is adjusted to 30% - 50%, which needs to be paid upon finalizing the customized details and signing the contract. The remaining balance is also required to be paid off before the goods are loaded. Only when the balance is cleared can the goods be guaranteed to be delivered to your designated location on time and smoothly, avoiding any possible delays or disputes.
3.About Delivery & shipment
For in-stock products, with the support of our efficient logistics distribution system and internal coordination mechanism, we promise to complete the delivery within 10 days, enabling you to obtain the desired goods promptly. As for customized products, since they need to be produced according to specific specifications and requirements, involving multiple processes such as design confirmation, raw material procurement, and production, we will generally complete the delivery within one month, ensuring that you can receive the customized products that meet your needs as scheduled.
