Hebei Duojia Metal Products Co., Ltd. is a global industry and trade company, mainly producing all kinds of sleeve anchors, double-sided or full-welded eye screws/eye bolts and other products, specializing in fasteners and hardware tools development, manufacturing, trade and service.
The company is located in Yongnian, Handan City, Hebei Province, China, a professional fastener production city.Our company has a professional technical team, advanced machinery and equipment, to provide quality products and competitive prices. A wide range of products, to provide a variety of shapes, sizes and materials of products, including carbon steel, stainless steel, brass, aluminum alloy for everyone to choose, can be customized according to customer needs special specifications, quality and quantity.
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Choose the right product to prevent stainless steel locking: (1) Confirm whether the mechanical properties of the product can meet customer requirements, such as the tensile strength of bolts, the safe load of nuts, etc; (2) On the premise of meeting the corrosion resistance requirements of the application environment, bolts and nuts of different material grades can be used, such as 304 bolts with 316 nuts; (3) Nuts and bolts made of the same batch material should not be used together as much as possible; (4) The length of the screw should be appropriate, generally based on exposing 1-2 teeth of the nut after tightening; (5) It is recommended to use anti lock nuts in high-risk locking situations. Proper use of stainless steel fasteners to reduce the occur...
The situation where the screw cannot be unscrewed and cannot be removed is called "locking" or "biting", which usually occurs on fasteners made of stainless steel, aluminum alloy, titanium alloy and other materials. Among them, flange connectors (such as pumps and valves, printing and dyeing equipment), railway and curtain wall first level high-altitude locking operations, and electric tool locking applications are high-risk areas for stainless steel fasteners to lock. This problem has been troubling the stainless steel fastener industry for a long time. In order to solve this problem, fastener industry professionals have also tried their best to start from the source, combined with the characteristics of stainless steel fasteners, and summarized a series of p...
No man of any age can refuse an excavator! The strength of China's infrastructure is beyond doubt, and China's excavator technology is also well-known. As the main construction machinery in engineering construction, the importance of excavators goes without saying. So, what should be paid attention to when using various bolts of different sizes on excavators? Many people, when repairing and maintaining excavators, will go to the original factory to replace large parts that are broken, while for some small bolts and screws that need to be replaced, they can simply find a replacement of the same specification. It is precisely because of this mindset that excavators continue to malfunction frequently even after repairs. This is ...
Spring washers, abbreviated as spring washers, are widely used fasteners with low cost and simple installation, commonly used to prevent nut loosening. Although spring washers are quite common, there may also be some issues during use that affect their effectiveness, such as the opening expansion ring. Many friends attribute this problem to the quality of the spring washer when they discover it. In fact, this may not necessarily be caused by product quality. The stress situation of the spring washer during use and the improper use of the matching flat washer can all lead to the expansion of the spring washer. In general, the spring washer that experiences bulging must be subjected to a radial outward tension, which is caused...
Hebei Duojia, as a leading fastener procurement solution service provider in China, has recently successfully participated in the supply of multiple water photovoltaic power generation projects. Photovoltaic power generation project is a strategically significant green energy project aimed at reducing dependence on traditional energy, lowering carbon emissions, and promoting sustainable development through solar power generation technology. However, during the construction process, the project team faced multiple challenges such as tight schedule, complex working environment, and high technical requirements. Duojia, with its rich industry experience and professional technical team, provides a comprehensive fastener procuremen...
