1. What is a hexagon socket screw

The hexagon socket screwdriver looks like "7". Cut the two ends of the hexagonal steel bar and then bend it to 90 degrees to form a hexagon socket screw wrench. It is sold in hardware tools stores. The hexagon socket screws are divided according to their heads. Cylinder head hexagon socket bolts, and there are many varieties of them, according to the raw materials, there are iron, that is, carbon steel and stainless steel. Stainless steel hexagon socket bolts are also made of stainless steel SUS304 and SUS202, etc., half round head hexagon socket bolts, this is also called pan head hexagon socket bolts. Countersunk hexagon socket head bolts, the head is flat head, and the inside is hexagon socket; there is also a variety of national standards that is more special, called headless hexagon socket bolts, which are also commonly called machine screws, payment screws, and set screws . This is the common name of headless hexagon socket bolts, but the meaning is the same. Of course, there are some flower-shaped hexagon socket head bolts, which are rarely used and are basically difficult to see in the market.

Hexagon socket screws are often used in machinery. They are fastened, disassembled, and are not easy to slip. The socket wrench is generally a 90° turn. The bent end is long and the other is short. The long side can save a lot of force and can tighten the screws better. The long end has a round head (similar to a hexagonal cylinder) and a flat head. The round head can be easily inserted into the screw hole and quickly disassembled. The production cost of the outer hexagon is much lower than that of the inner hexagon. It also has a screw head (the direction of the wrench's force) is thinner than the inner hexagon, and some local hexagons cannot be replaced by the inner hexagon. In addition, the machine with low cost, low power strength, and low precision requires much less internal hexagonal screws than external hexagonal screws.

2. What to do with the sliding thread of the hexagon socket screw

If you want to take out the sliding screw, you can try three plans:

a. There is something called "Broken Screw Extractor" which can be found and tried;
b. Use an alloy drill bit one size smaller than the sliding wire screw to drill off the sliding wire screw, there will be some thin wall residue around it, and then slowly remove it;
c. EDM can be used for disposal. If the workpiece is not easy to move, there is a portable EDM machine that can be found.

After using the above methods to take out the threaded screw, the internal thread of the original threaded hole may be damaged:
a. If the damage is slight, the standard tap of the corresponding thread standard can be used after a while and it can still be used normally;
b. If the damage is more serious, under the premise that the wall thickness around the threaded hole allows, you can consider further using the "wire thread insert" for correction. If the "wire thread insert" is used for correction, the strength will not be affected or may even be greater than The original thread strength, and still use the original standard bolts.