Shoulder bolt, hexagonal head cross hole screw, stainless steel brass hollow bolt M4 M5

A self-locking screw, comprising a screw body, wherein the upper part of the screw body is provided with a metal screw head, the middle part of the screw body is provided with a thread, and the upper part of the screw body is provided with interference grooves on both sides. The center line of the interference groove is at an angle of 280-356 ° with the horizontal line. The bottom of the screw body is equipped with an elastic clamp, which includes an optical axis and a conical head. Guangdong Yueluo Hardware Industry Co., Ltd. Guangdong Yueluo Hardware Industry Co., Ltd. adopts an elastic clamp design, with thread segments and interference grooves set on the screws, which generates elastic force along the axial direction of the screw during the screw rotation process, achieving reliable self-locking effect, convenient use, and high tuning efficiency.

At present, in standard cabinets such as computers, networks, and automation, to fix the equipment in the cabinet, fasteners are needed to fix it. The nuts in the existing fasteners use ordinary nuts, which are of an internal card structure. When installing, there are the following drawbacks: 1. The installation and disassembly are complex, requiring a large amount of force to clamp the nuts in, and each nut has errors due to processing, Resulting in the nut being unable to be installed or disassembled at all; 2. After prolonged use of the nut, the nut edge may become loose, which affects its use; 3. Installation or disassembly can easily cause falling and may cause electrical short circuits, posing a safety hazard; 5. Low efficiency of equipment installation work.

In a steel making plant, the wheels of the metallurgical casting crane crane crane crane operating mechanism used for hanging liquid metals are connected to the universal shaft through a flange. Usually, a keyway is set in the radial direction of the connecting flange, and the keyway is a through groove. A B-type flat key is set in the keyway to transmit torque. During frequent forward and reverse movements of the wheel, it is easy to loosen the flange connecting bolts. Due to the keyway being a through groove, the flange connecting bolts become loose, It is easy to cause the B-type flat key to fall off from the keyway of the connecting flange and cannot transmit torque, seriously affecting the efficiency of the locomotive's operation. In addition, due to the B-type flat key falling off and unable to transmit torque, the locomotive can only rely on the connecting bolts to transmit torque. Due to the poor performance of the connecting bolts in transmitting torque, it is easy to damage and scrap the connecting bolts, which in turn leads to damage to the connecting flange and requires frequent replacement and maintenance, resulting in high costs, Moreover, maintenance is difficult, which also increases the unsafe factors of the equipment and poses safety hazards.

The anti rotation T-shaped bolt includes a screw and a head, and an anti rotation protrusion is designed at the connection between the head and the screw. The cross-section of the anti rotation protrusion is a square angle with the screw radius as the side length. One or two anti rotation bamboo shoots can be designed to ensure uniform force on the bolts.

The upper part of the T-shaped bolt is a screw, and the bottom end is a T-shaped head. It is equipped with a sleeve with an anchor plate, and the fastening equipment is installed by the anchoring force between the T-shaped head and the anchor plate. The appearance of the equipment after installation is shown in Figure 3, where the black line pattern is a component composed of a T-bolt and an integral sleeve. When constructing the civil foundation, the sleeve is first embedded, and the T-bolt is only anchored into the sleeve during the equipment installation stage.