Galvanized full thread stud without cap, full thread, ultra short stud M10

The installation of riveting nuts is meticulous, and if the installation method is not correct, there may be a phenomenon of unstable riveting after riveting. If we had a customer who reported that the nuts would fall off after riveting, our technical personnel found that many customers used hammers or other impact methods to hit them on site. This installation method of riveting nuts can cause uneven force on the nuts and seriously affect the riveting effect. It appears that the nuts have been pressed in, but in reality, the flower teeth of the riveting nuts are not riveted to the plate at all, which is definitely not reliable riveting. The installation of rivet nuts must be carried out using specialized installation equipment, or simply using a press and stamping equipment (these simple equipment are generally available in factories).

"Generally, surface treatment is not required for lifting ring screws, but according to requirements, surface treatments such as galvanizing, passivation, and chromium plating can be carried out, and they should comply with the provisions of GB5267-85.
After electrogalvanizing, the chemical composition and mechanical properties of the material should be immediately subjected to oxygen removal treatment according to the test method specified in GB699. During routine inspection, the grain size test may not be advanced, and the testing method for grain size shall be in accordance with the provisions of YB27. Thread inspection is carried out using thread gauges and smooth limit gauges or universal gauges"

A flexible cylindrical pin loading and unloading tool, including a rectangular base, wherein a hollow cylindrical fixture station is arranged for fixing the fixture and installing cylindrical pins on the fixture for shear force testing. The fixture includes an outer cylinder and an inner cylinder that are sleeved together, and the outer cylinder and inner cylinder are in a gap fit. The base is also provided with a counterbore for removing the inner cylinder after the fixture testing is completed.

The commonly known bolt refers to a screw with a larger diameter, and according to this statement, a screw has a much smaller diameter compared to a bolt. Double headed bolts do not have a head, and some are called double headed studs. Both ends of the double head bolt are threaded, with no thread in the middle and a smooth rod in the middle. Double headed bolts are used on large equipment such as speed reduction racks. In practical application, the external load will experience vibration combined with the influence of temperature, resulting in reduced friction force. Over time, the threaded connection will become loose and fail. So it is necessary to do a good job in the maintenance of the double head bolts during normal times. Double headed bolts or anchor bolts can have problems under long-term mechanical friction. When problems occur, the engine oil pan should be removed, and the use of the engine bearing shells should be carefully checked to see if the gap between the bearing shells is too large. If the gap is too large, it should be replaced in a timely manner. When replacing the double head bolts, also replace the connecting rod bolts. If some large equipment, such as nail making machines, find that the engine is not running stably or makes abnormal noises during normal operation, they should also be stopped and checked in a timely manner to avoid larger problems.