As you can see, screws, nuts, and washers are used all across the world in almost each application.

People use them for tasks like making furniture, installing signs, and even for locks.

The fascinating thing about these fasteners is that although they are one of the most commonly used things in the world, people still don't know what they are called.


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Step by Step how to clean an evaporator

In this photo, you can see how to clean step by step a dirty evaporator using all the required tools.

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What is the reason for painting this metal duct red?

The photo shows a black steel duct that can be used in different applications like kitchen hoods.

As this duct will not be insulated, we paint the outer surface of black steel ducts with red oxide coating.

This coating acts as a preparatory or protective coating that prevents rust formation on the ferrous metal surfaces exposed to humidity and air.

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