Waterproof screw, as the name implies, is waterproof, oil-proof screw, generally can be divided into two types.One is to apply waterproof glue under the head, and the other is to install the O sealing ring directly under the head to play a waterproof role.Then Suzhou Anzhikou screw manufacturers to talk to you: the principle of O ring sleaing screw:
As we often use is the coiling head cross/torx waterproof screw, the sealing ring is directly toward the rod body far, set under the screw head, the head is reasonably provided with a slot, limit the sealing ring with.Avoid in the process of screwing, can reduce the possibility of sealing ring by the external thread of the rod body damage, to ensure the effect of sealing and waterproof.
At the same time, when the arc concave of the sealing ring is matched with the assembly surface, when the screw is screwed into the workpiece and tightened, the sealing ring will be increased in pressure, and just fill the gap of the groove of the whole head, so it can play a good waterproof effect.
Suzhou Anzhikou Hardware Technology Co., Ltd. is a manufacturer with 20 years of screw custom production experience, currently production waterproof screw is mainly M3 and M4 these two specifications, the length of the screw from 5mm to 16mm at present, the existing waterproof screws are cross groove and plum groove, can be customized according to customer requirements,of course, also can provide the samples free, if necessary, welcome to consult.