Where are self-tapping screws used? Self-tapping screw classification application
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Self-tapping screws are mostly used for the connection between thin metal plates. The thread is a common thread with an arc-shaped triangular cross section, and the thread surface also has a high hardness.
Self-tapping screws are mostly used for the connection between thin metal plates. The thread is a common thread with an arc-shaped triangular cross section, and the thread surface also has a high hardness. Therefore, when connecting, the screw can also tap the internal thread in the threaded bottom hole of the connected part to form a connection. This screw is characterized by low screw-in torque and high locking performance, better working performance than ordinary self-tapping screws, and can be used instead of machine screws.
Wallboard self-tapping screws are used for the connection between gypsum wallboard, etc. and metal keels. The thread is a double-headed thread, and the thread surface also has a high hardness (≥ HRC53), which can be quickly screwed into the keel without making a prefabricated hole to form a connection.
The difference between self-drilling self-tapping screws and ordinary self-tapping screws is that when connecting, ordinary self-tapping screws must go through two processes: drilling (drilling the bottom hole of the thread) and tapping (including fastening connection). When connecting self-drilling self-tapping screws, the two processes of drilling and tapping are combined to complete. It first uses the drill bit in front of the screw to drill, and then uses the screw to tap (including fastening connection), saving construction time and improving construction efficiency.
Pan head and hexagon head tapping screws are suitable for occasions where the drill bit is allowed to be exposed. Hexagon head tapping screws can have a larger torque than pan head tapping screws. Countersunk head and hexagon flower-shaped self-tapping screws are suitable for occasions where the nail head is not allowed to be exposed. Hexagon flower-shaped self-tapping screws can bear greater torque than static head self-tapping screws; semi-static head self-tapping screws are suitable for occasions where the nail head is allowed to be slightly exposed. When assembling and disassembling self-tapping screws, slotted self-tapping screws need straight screw screwdriver, cross recessed self-tapping screws need cross screw screwdriver, hexagon socket self-tapping screws need hexagon socket wrench, hexagon head self-tapping screws need blank wrench, ring wrench, socket wrench or spanner.
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