China hardware Stainless steel screw manufacturer

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...

The further optimization of the current product structure is an important strategic shift for fastener companies. The gradual transformation of low-carbon steel hexagon nuts into A194 2H-class nuts mainly producing medium-carbon steel will enable the company to obtain more profitable space. For this reason, the quality has higher requirements on the production process and preparation of nuts. In the face of such structural adjustments, it is necessary to start the formulation of quality control plans and inspection specifications from the following aspects. First, the preparation before the output; The second is the random inspection in the output; Third, the final inspection after delivery. First of all, the pre-production preparation includes: related personnel, equipment status, mold equipment, production process, raw materials, etc. However, the first item involves three major aspects: a, mold preparation; b, inspection method; c, the control of the production process, leading to h...

The quality problem of the elongated screw during the tapping process is the tightness of the teeth. The tightness is usually caused by the bending of the straight part of the tapping handle, the dullness of the tapping, the over-tolerance of the effective diameter, and the irregularities of the upper and lower tracks. In view of the reasons for the tightening of the teeth, measures such as orthodontic taps, replacement taps or runway adjustments can be taken. Analysis of screw tapping defects: A. Poor appearance: Poor appearance phenomena include: crooked rod, rough tooth bottom diameter, insufficient teeth, tail teeth not rubbed to the tip of the tail, etc. It can be improved by adjusting the dental plate. B. Poor tooth bottom: For tooth bottom peeling (such as wood screws), you can adjust the quick-entry angle and the upright angle of the fixed tooth plate, and push the quick-entry angle inward appropriately. C. Poor tooth tip (small teeth rolling): Poor tooth tip phenomenon include...

 There are many kinds of electroplating of iron combination screws: ordinary and environmentally friendly. For example: color zinc, generally called red color. White zinc, black zinc, white nickel. Blue zinc. There are environmentally friendly color zinc, environmentally friendly white zinc, and environmentally friendly blue zinc. Environmentally friendly white nickel. There are more advanced ones. Nickel on copper, nickel in brine. Tools/Materials Screw wires, iron screw wires include 1010, 1018, 10B21, etc. Stainless steel screw wires include SUS201, SUS304, etc. Steps/Methods The requirements for the material of the combined screw depend on which material is required, whether it is iron or stainless steel. What is the national standard number of the combination screw? There are GB9074.8 and GB9074.4. There are GB9074.13 and so on. The mechanical performance and strength requirements of the combined screw need not be hardened. The level requirements are divided into 4.8 and 8.8 l...

 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...