The screw is tight, what should I do if I can't unscrew it?

If the screw is twisted, the following methods can be used:

1. Apply some double-sided adhesive or non-woven fabric to the screw head first, then drop a small amount of 502 glue into the screw hole, screw in the screw, wait for a few minutes, and then screw out the screw with a needle-nosed pliers after the glue is completely solidified (don't use a screwdriver, it will easily cause the screw to slip off).

2. If the nut is exposed, it is recommended to clamp the corner of the nut with pointed pliers, and then unscrew the screw.

Put the screwdriver head on the fire to burn red, immediately push it on the screw, and it will come out at once.

4. Put the molten solder on the welding torch head, aim the screwdriver at the screw, point the solder on it, and then unscrew it after the temperature drops.

5. If the screw is not unscrewed by the above method, disassemble it violently with an electric drill, destroy the screw and take it out.

Screw classification

Hexagon head screws and large hexagon bolts, as the name implies, are externally threaded fasteners with hexagon heads and are designed to be turned by wrenches. According to ASME? According to the standard B 18.2. 1, the tolerance of head height and rod length of hexagon-head screws is smaller than that of general hexagon-head bolts, so hexagon-head screws are suitable for installation in all places where hexagon-head bolts can be used, including those where hexagon-head bolts are too big to be used.

Hexagon head screw is a screw with a hexagonal inner hole in the head, which can only be tightened or loosened after inserting a hexagonal ruler into the inner hole. The most commonly used hexagon socket head screw is a cylindrical head screw, and its head diameter is about 1.5 times of the main diameter of the thread. Other head types include semi-circular head screws with beautiful surface and flat head screws suitable for tapered screw holes. The countersink design enables the screw head to rotate without being exposed to the surface of the fixed object, so it is often used in places where the traditional wrench has a small surface and is inconvenient to use.