Actually cross trough pan head screw is to a kind of strengthening and improving the cross slots, general practice is at the top of the cross slot a bearing slots with a connecting screw head slotted type, according to the unique tighten special tools or a screwdriver to screw with large torque to install the actual effect, also can consider fast manufacture must actually work.But the production process is more complicated than the cross groove and the word groove processing technology without a very clear specification.

In the actual application is also the cross groove 2 groove around the other this kind of practice, so the finished product groove in the actual application of the whole process is more easy to apply, but will increase the production cost.

Phillips screws in addition also has a high torque and high torque cross slot and general cross slots bigger difference depends on the cross in the center line of the compression and brain bus duct is not symmetry, but all with the help of the cross the center line of the side, in the application process because all of the moment lay particular stress on compression face side on the other hand, combined with high torque of the bias in the rectangle cross groove groove, prompting the trough type torque loss is very small, screw driver torque to transmit immediately do male greatly improved the cross slot on high speed guidance and the disadvantage of small torque.

However, the mesh indicates that the wear loss of this kind of groove is more serious in the production and manufacturing, which will make the production and processing of this kind of groove more difficult than the general groove, so it is not a high torque regulation at that time to minimize the application of this groove.