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What are self-tapping sheet metal screws and how do they work?
Characteristics of sheet metal screws
Self-tapping sheet metal screws differ from conventional screws in that they have a sharp tip and a thread with a larger angle and a smaller pitch. These features mean that the screw can cut through metal as it rotates and create its own hole, while filling it with the thread and holding it firmly.
Self-tapping sheet metal screws can have different head shapes, depending on the type of tool used to tighten them or the finish you want to give. Some examples are:
Hex head
They are tightened with a wrench or ratchet and have good torque resistance.
domed head
They are tightened with a flat or star screwdriver and have a more aesthetic appearance.
Countersunk head
They are tightened with a flat or star screwdriver and sit flush with the surface, without protruding.
Advantages of self-tapping sheet metal screws
Self-tapping sheet metal screws have several advantages over other fastening methods, such as:
- They save time and work, since they do not require making previous holes or using nuts or washers.
- They reduce the risk of damaging the material, since they do not produce chips or deform the sheet.
- They increase the strength and durability of the joint, since they adapt to the thickness and shape of the sheet and prevent loosening due to vibrations or expansion.
- They allow parts to be easily disassembled and reassembled, if necessary.
How to use self-tapping sheet metal screws
To use self-tapping screws correctly, follow these steps:
- Choose the appropriate size and shape of the screw, depending on the thickness and type of metal of the sheet.
- Mark the point where you want to make the hole and place the screw on it, with the tip facing down.
- Apply constant pressure and turn the screw clockwise until it penetrates the sheet metal and is tight.
- Repeat the process with the other screws, maintaining a uniform distance between them.
Self-tapping sheet metal screws are a practical and effective solution for joining metal sheets quickly and safely. If you want to know more about these screws or buy them at the best price, we will be happy to advise you.