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                        What's the difference between high strength nut and common nut?

                        點擊數:3492021-05-13 09:06:00 

                        Many users can not tell what is different between high-strength nuts and ordinary nuts. In fact, it is easy to distinguish them as long as they know their specifications and other characteristics. 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, the general high-strength nuts are used with high-strength bolts to achieve better use effect.

                        We generally see that many bolts with m-heads are ordinary nuts in the market, but not high-strength nuts. On the other hand, the calibration side of hexagon nuts is M30, where M30 indicates the thread specification, that is, the thread diameter is 30mm, grade 10 indicates the performance of bolts, and TZN is the surface treatment method. Other bolts also have their own expression methods, However, the performance grade of bolts with thread shall start with "m":

                        The performance grades of nuts are divided into 4.8, 5.8, 8.8, 10.9 and 12.9 grades with high strength from small to large. This marking method means that 10 is taken as an example 10 to mark 1/100 of the tensile strength of the bolt, that is, the tensile strength of the bolt must reach 1000MPa, and it may be higher than 1000MPa.

                        Gb/t3098.1 specifies that the smaller tensile strength of the bolts of this grade must be greater than 1040mpa. The marked yield strength ratio after decimal point, that is, the yield strength of bolt (yield strength / tensile strength) =0.9, namely yield strength = 1000 * 0.9 = 900MPa, the yield strength of the grade bolt must be higher than 900MPa to be considered qualified. Generally, we call the nuts of grade 8.8, 10.9 and 12.9 as high strength nuts.

                        It should be noted that the specific yield strength values of the three grades of bolts are not given in gb/t3098.1, because 0.8 and 0.9 are the smaller yield strength ratio specified in this grade for high-strength bolts. Since high-strength bolts are used for very important links, there is no spot sale on the market, so it must be reserved to the bolt manufacturer, Therefore, the specific yield strength ratio is generally produced by the buyer by specific values

                        Hebei Xinli Fastener Manufacturing Co., Ltd. is committed to the production and development of bolt nut fasteners. The products are widely used in the fields of power, steel structure, construction, mining, photovoltaic, machinery, transportation, railway, etc. with fine production technology and strict quality management system, we provide customers with detailed, attentive and reassuring one-stop service.
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