Since entering the line and seeing relevant industry products, the eyes are shining. The screw sister went to the streets this day and shot all the way. Make a small summary:
Look at the mark, look at the mark, read the five holes after reading, and then listen to my science: PCD and hole position: PCD's professional name is the diameter of the pitch, which refers to the diameter between the fixing bolts in the center of the hub, the general wheel hub The large porous position is 5 bolts and 4 bolts, but the distance between the bolts is also different, so we can often hear the names of 4X103, 5X114.3, 5X112, and 5X114.3 as an example. The PCD of the hub is 114.3mm and the hole is 5 bolts. PCD is one of the most important parameters when choosing a hub. For safety and stability reasons, it is best to choose the same PCD as the original car for upgrade.
Mercedes hex wheel hub screws
Look at another one:
Unlike Mercedes-Benz models, the appearance and logo of the hub screws are different. But today I saw only two of them.
Land Rover's Hexagon Screws:
Audi is hidden, but as far as I know, it is basically non-standard hexagonal or non-standard hex:
Volvo, domestic high-end models:
Volvo wheel screw
After reading so many on the wheels, let's take a look at the look of these hexagonal screws:
The black hexagonal hexagonal screw above is a high-strength hexagonal titanium alloy screw. The most important feature of titanium alloy screws is wear resistance, high strength and not easy to be broken.
The following is a stainless steel hex screw, the price is better than the titanium alloy screw, but the performance and effect are not much different.
The black and white above are all auto parts screws, which seem to be simple, but the customization process and the requirements of the product are not simple. The auto parts screws are different from other ordinary screws. In terms of strength and precision, the mechanical properties of the various grades from 4.6 to 10.9 have different standards. The thread diameter and pitch of the screws have corresponding standards. Therefore, manufacturers looking for auto parts screws should pay attention to the production strength and experience of the manufacturers, so that they can meet the standards of auto parts in terms of quality.
Concerned about surprises
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