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05
2024
-
07
What types of screws can be divided
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1. machine screws
Mechanical screws refer to bolts and nuts used to connect two parts. Common ones are hexagon head bolts, round head square neck bolts, nuts, etc. They are usually used to connect steel structures, mechanical equipment and other occasions that require greater force. The mechanical screw has a deep tooth shape and can provide a stable connection effect, but it needs to be tightened with a wrench, and the operation is relatively troublesome.
2. self-tapping screw
Self-tapping screws are also called in-line screws. They are a type of screws that cut out threaded holes from the material of the connected object while screwing in. Common ones are countersunk self-tapping screws and semi-countersunk self-tapping screws. Self-tapping screws are usually used to connect thinner metal or plastic parts, and their teeth are shallow, usually without the use of a wrench, and the operation is relatively convenient.
3. wood screws
Wood screws are mainly used to connect wooden structures, including self-tapping wood screws, double-headed screws, furniture screws, etc. The head of the wood screw is flat or hemispherical, usually with the appearance of the connected parts, beautiful and generous. The tooth shape of the wood screw is relatively deep, which can provide a more stable connection effect, but it needs to be tightened with a wrench.
4. Nail
Nails can also be regarded as a kind of screw, they are different from bolts, nut-type screws, is a kind of metal fasteners directly nailed into the connection. Common nails include tacks, square nails, menu nails, etc., their teeth are shallow, usually do not need to use a wrench, but the connection effect is relatively poor, easy to loosen in the strong occasions.
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