Consumers, as non-professionals, how to protect their own interests to ensure that they do not buy bad screws, screw manufacturers share some tips for selecting screws, hoping to help everyone choose to buy screws.
1. The screw manufacturer tells you that the surface of the good screw is fine and smooth, smooth and regular, and the bad edge is not polished, and there are burrs. If this is the case, try to buy a smooth and good screw;
2. Good quality screws have a long service life. You can ask the manufacturer how much its service life is to decide whether to buy it;
3. The screws shared by the screw manufacturers can fasten objects, machines, and work closely with other things.
How to judge the quality of stainless steel screw manufacturers?
The screws produced by stainless steel screw manufacturers are widely used in electrician, electrical appliances, lighting and hardware building materials manufacturing industries to make them beautiful, strong, safe and stable. So how do you judge that the screws produced by stainless steel screw manufacturers are of good quality?
1. A good time for establishment is important, because you have been doing it for a long time and have rich experience. If you want to buy good stainless steel screws, you may choose a screw manufacturer with a longer age;
2. Understand the company you want to choose from the perspective of peers or customers, so that you can think about whether to choose this one;
3. You can start with the customers who cooperate with stainless steel screw manufacturers to find out whether their after-sales service is possible.
What is the difference between high-strength nuts and general nuts, in fact, you only need to understand their standards and other characteristics to easily distinguish them. The so-called high-strength nut is a special bolt with high strength and high fatigue resistance used in special equipment or engineering. Of course, generally high-strength nuts are used with high-strength bolts to achieve better application. We generally see that many bolts with M heads in the market are ordinary nuts, not high-strength nuts. The calibration side of the general hexagonal head nut is the following pattern M30, and M30 indicates the thread standard, that is, the inner diameter of the thread is 30mm. Grade 10 indicates the functional grade of the bolt, and tZn is the surface treatment method. Other types of bolts also have their own expressions, but generally threaded bolts have to use the original functional grade of "M": The functional level of the nut is divided into 3, 4, 4, 5, 5.8, 6...
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