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What are the non removable fasteners?更新日期：[2020-05-20]
As the most common connecting parts, there are many types of fasteners, among which the non detachable fasteners mainly include solid rivets, pull rivets, pull bolts, lock bolts, bracket nuts (pull rivet nuts), etc. different types of fasteners will be introduced in the following Chinese standard parts.The tighter the bolt, the better? Or half a turn back?更新日期：[2020-05-20]
When many people fix the mechanical equipment, they will screw the bolt to the point where it can't be screwed. Is this a good way? Not exactly. It's also said that bolts should be tightened and then back half a circle. Is that right? Is there any scientific basis? In fact, there are many believers in life w...Selection principle of stainless steel materials for fasteners更新日期：[2020-05-20]
Fasteners are commonly used parts in mechanical equipment, with a very high utilization rate. Usually there are screws, nuts, bolts, rivets, etc. in order to ensure the safety of fastener use, we will have certain principles in the selection of materials. According to the knowledge of fastener use, China ...What stainless steel materials are commonly used for fasteners?更新日期：[2020-05-20]
What stainless steel materials are commonly used for fasteners? 1. Austenitic stainless steel The commonly used grades are 302, 303, 304 and 305, namely the so-called "18-8" austenitic stainless steel. Both corrosion resistance and mechanical properties are similar. The starting point of sele...Different kinds of expansion screws and different installation methods更新日期：[2020-05-20]
The utilization rate of expansion screw is very high in the process of decoration and product placement. After the expansion screw is punched into the hole on the ground or wall, use a wrench to tighten the nut on the expansion bolt, and the bolt moves outward, while the metal sleeve on the surface does not ...What is the difference between special bolt and common bolt更新日期：[2020-05-20]
1. There is no national standard bolt called special bolt, which is generally used in special occasions and special purposes. The difference with ordinary bolts is whether there is a national standard. 2. Bolt: mechanical part, cylindrical threaded fastener with nut. A type of fastener consisting of hea...What is self tapping screw更新日期：[2020-05-20]
Generally, it refers to the wood screws with sharp head, coarse teeth and hard texture, as well as aluminum alloy and plastic. A special self tapping screw for tapping metal holes is called a tap. Self tapping screw is used for non-metallic or soft metal, without bottom hole and tapping; self tap...Type of nut更新日期：[2020-05-20]
Nuts are the parts that connect the mechanical equipment closely. Only nuts and bolts of the same specification can be connected together through the inner thread. For example, m4-p0.7 nuts can only be connected with m4-p0.7 series bolts (in nuts, M4 refers to the inner diameter of the nut is about 4mm, 0...Purpose of screw steel更新日期：[2020-05-20]
Purpose of screw steel: screw steel is widely used in building, bridge, road and other civil engineering construction. As far as the public facilities such as highway, railway, bridge, culvert, tunnel, flood control, dam, etc., as well as the foundation, beam, column, wall, slab and screw steel of housing ...Hot dip galvanizing process and relevant instructions更新日期：[2020-05-20]
Technological process workpiece → degreasing → washing → pickling → washing → dipping auxiliary plating solvent → drying and preheating → hot galvanizing and hot galvanizing → finishing → cooling → passivation → bleaching and hot galvanizing and washing → drying → inspection of relevant technological ...
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