Shenzhen Pinggu precision hardware stainless steel standard parts manufacturers, Main: self-piercing rivets, metal screws, stainless steel screws and stainless steel fasteners, stainless steel screws, hardware accessories screw processing and sales, on the use of self-tapping screws what purpose? Today fixed hardware small series for everyone details:
Self-tapping screws are mostly used for connection between thin metal plates (steel plates, saw blades, etc.). When connecting, thread the bottom hole of the connected part first, and then screw the tapping screw into the bottom hole of the threaded part of the connected part. Since the thread surface of the self-tapping screw has a high hardness (≥HRC45), the internal thread can be tapped in the bottom hole of the thread of the connection member to form a connection.
Wallboard self-tapping screws are used for the connection between gypsum wallboards and metal keels. The thread is double-threaded, 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 self-drilling self-tapping screw differs from the ordinary self-tapping screw in that the ordinary self-tapping screw must be drilled (drilling thread bottom hole) and tapped (including fastening connection) when connecting, and self-drilling self-tapping When the screws are connected, the drilling and tapping operations are combined once. It drills holes with a drill in front of the screws, and then taps (including fastening connections) with screws, saving construction time and increasing construction efficiency.
Pan Head and Hex Head Self-tapping screws are suitable for applications where the drill bit is allowed to be exposed. The hexagon head self-tapping screws can have larger torque than the pan head self-tapping screws. Countersunk head and hexagon socket type self-tapping screws are suitable for applications where nail heads are not allowed to be exposed. Hexagonal flower type self-tapping screws can withstand larger moments than static head self-tapping screws; semi-static head tapping screws are suitable for slight exposure of nail heads. Occasions. When the self-tapping screws are assembled and disassembled, the slotted self-tapping screws need a slotted screwdriver. The Phillips slot self-tapping screws need to use the Phillips-head screwdriver, the hexagonal flower-shaped self-tapping screws need the hexagonal flower wrench, and the hex head is Taping screws need to use wrenches, box wrenches, socket wrenches or adjustable wrenches.