What kind of self tapping screw can attack aluminum profile?
General aluminum, iron, stainless steel can attack ah!
According to the national standard of self tapping screw, all can, because the general self tapping screw is carburized layer, the surface will harden, attack aluminum and wood, plastic is not a problem. But now many of the things that are made in China are of poor quality. If you attack the aluminum material, it's better to use a little bit of screw
Self tapping screws are used for connecting between thin metal plates. When connecting to the connecting piece for the threaded hole, then tapping screws into the threaded hole of the connecting piece. Because of the self tapping screw thread surface has higher hardness (more than 45HRC), the attack a thread in the threaded hole of the connecting piece, thereby forming a connection.Aluminum material than steel soft, generally in accordance with GB screws can be of aluminum, is recommended to hit bottom hole in the needed position.The following is the national standard for self tapping screws:GB/T15856.1-2002 cross recessed countersunk head tapping screws, material: 20Mn 15MnBGB/T15856.2-2002 cross recessed countersunk head drilling self tapping screw, material: 20Mn 15MnBGB/T15856.3-2002 cross recessed semi countersunk head drilling self tapping screw, material: 20Mn 15MnB
