Why yellow screws better than black?

At first glance, the yellow and black screws completely indistinguishable from each other except for the color, but if become familiar with their physical properties, we can immediately conclude that the yellow is much more versatile and practical. Why?

First black screws is especially fragile, they often break. I once bought two packages of screws and literally every third fell into disrepair.

In - the second, even though they are covered with a protective layer phosphated corrosion, but over time will still rust, especially if there is moisture. This is a huge disadvantage, because it turns out that they should be applied. E within the warm dry room.

Well, the third minus - Black screws very easily disrupt the slot, especially if you increase the strength of twist or to use low-quality bit.

Now for the yellow.

Unlike black have high resistance to corrosion, due to the fact that they are covered with no phosphorus and zinc salt solution. By the way thanks to this solution, the screws are yellow.

At the splines of the screws there are additional notch that prevents scrolling or breakdown. With this installation work can be done much faster.

Yellow screws are available in a large number of sizes than black, to be precise the diameter of 1.6 to 6mm and a length of 1 cm to 25 cm. It allows you to perform virtually any installation work from minor to major.

Also, these screws having a short pitch of the thread, which suggests that different types of metal structures that can be fixed by them.

Generally yellow screws, as mentioned above really practical black, but there is one, they are more expensive, the cost is different from the black several times. Although, judging by the fact that black is constantly broken and they will have to buy more, we can conclude - the price will be almost identical.

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