Fastener National Standard

Fastener production standardGB/T192-2003 Ordinary thread basic tooth profileGB/T196-2003 Ordinary thread basic sizeGB/T197-2003 common thread toleranceGB/T2516-1981/IS0965-3: 1998 limit deviation of ordinary thread (diameter 1-355mm)GB/T9145-2003/ISO 965-2: 1980 ordinary thread medium precision, the limit size of the preferred seriesGB/T15756-1995 common thread limit size...


Wofu common fastener installation pre-tightening force and tightening torque table

Terms and acronyms:Fm: Installation pre-tightening force, unit KNMa: The tightening torque of Fm pre-tightening bolts during installation, in NmuG: the friction coefficient in the threaduK: Coefficient of friction in the bearing surface of the bolt head-Generally without special instructions, the friction coefficient is uG=uK=0.12...


Analysis of the advantages of hammer head T-bolts with teeth

We have done an analysis of the advantages and disadvantages of the current T-bolts on the market and the T-bolts produced by Wofu:...


What kinds of parts are there for fasteners

Fasteners are a type of mechanical parts that are used for fastening connections and are extremely widely used. Fasteners are used in a wide range of industries, including energy, electronics, electrical appliances, machinery, chemicals, metallurgy, molds, hydraulics, etc., in various machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments All kinds of fasteners can be seen on, chemicals, instruments and supplies, etc., which are the most widely use...


Selection of standard materials

1. Requirements for the mechanical properties of the standard parts and materials, especially the strength; 　　2. The requirements of working conditions on the corrosion resistance of materials; 　　3. The requirements of the working temperature on the heat resistance of the material (high temperature strength, oxidation resistance); 　　4. Requirements for material processing performance in terms of production technology; 　　5. Other aspects, such as weight, price, and ...


How much does the fastener screw nut plating know?

In order to prevent the corrosion of steel parts, it is one of the common methods to plate a layer of zinc on the surface. Due to different processes, different names have been generated.Galvanizing is mainly electroplated and fired. The former is the process of energizing the electrolyte containing zinc ions, and plating a layer of zinc on the surface of the steel parts; the latter is the process of melting the zinc and immersing the steel parts to make the surface adsorb a layer of z...


The real contrast between flange nuts and ordinary nuts

Flange nuts (figure 1)The size of the flange nut and the general hex nut is basically the same as the thread size, but compared with the hex nut, it is a one-piece washer and nut, and there is a non-slip tooth pattern below, which increases the nut and the workpiece The surface area of the contact, compared to ordinary nut plus washer combination, more firm and greater pull. The The surface contact ar...

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