1.StainlessSteel:SS201,SS303,SS304,
SS316,SS410,2205,2507
2.Steel: 35CrMoA, 35CrMo, 30CrMoA, 30CrMo, 42Cr2MoA, 42Cr2Mo;
3.Carbon Steel: 1010,1035,1045 4.Aluminum or Aluminum Alloy:Al6061,Al6063,Al7075,etc 5.Brass:H59,H62,Copper,Bronze
Plain,Black oxide, Nickel, Chrome, Zinc Plated(Clear/Blue/Yellow/Black).Other
special surface treatment can be made according to customers requirements.

Self-tapping screws, mainly made of carbon steel or stainless steel, are widely used on plastics, metal and
wood materials. 
The best part in the use of self-tapping screws is that there is no need to drill holes before they are used. 
The two basic types of self -tapping screws are thread-forming screws and thread-cutting screws. The
thread-forming screws are commonly used for plastic, deforming the material as the screws enter. The 
thread-cutting screws are typically used for wood and metal, removing some of the material and creating 
a threaded path for the screw.
Features of Self-tapping ScrewsSelf-tapping screws with press washer made of galvanized steel for various 
applications: fastening siding, corrugated board and other sheet materials, as well as fastening various types of
 profiles from thin sheet steel.
* Easy to screw in.
* High hardness.
* Both high and low temperature resistance.
* High tensile strength value.
* Various surface treatment for corrosion resistance and rust resistance.
* Different choices of colors.* Long service life, durable enough to handle repeated assembly and disassembly.
Head highlighting
surface treatment:black phosphated tapping point
Tip highlighting
surface treatment:blanco zinc coated with tapping point