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SUS 304 316 410 20mm 25mm DIN7504N Pan Head Phillips Self Drilling Screw

The tail of the drilling screw is in the shape of drilling tail or pointed tail, without auxiliary processing, it can be directly drilled, tapped and locked on the setting materials and basic materials, greatly saving construction time. Relatively common screw, its high ductility and maintenance force, combination after a long time will not loose, the use of safety drilling tapping once to complete the operation is simple.

Self drilling self tapping screw is suitable for wood material use, that is, we often say wood screw, generally manual operation, due to human constraints, this kind of screw is generally very small, the scope of use is relatively narrow;

Self-drilling screw with tapping screw is combine tap and bolts, the front is a tap, followed by a thread, in generally softer materials, drilling and well can be directly turned into an empty, by tap tapping screw, followed by a bolt thread for the matter, if the screw diameter is small, the material is soft, not even use first punch, such as screws into the wood;

Tapping locking screws are also used for the connection between thin metal plates, the thread is a common thread with arc triangular section, thread surface also has high hardness, so when connecting, the screw can also be connected to the bottom hole of the thread tapping out of the internal thread, so as to form a connection. The screw is characterized by low screw torque and high locking performance, better performance than ordinary tapping screw, and can replace the use of machine screws;

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