Hexagon head screws stainless steel semi-tooth

Hexagon head semi-tooth stainless steel screws DIN931 / GB5782 / ISO4014 / ANSI B18.2.1 / JISB1180
Hexagon SUS316 stainless steel screws, stainless steel screw rod and a half tooth GB5784

More than two and a half screw, although the same for a half teeth, but with thick rod and rod divided by the rough bar and a half teeth, is not threading stainless steel screw in until the rod diameter larger than the threading path, we M8 screws, for example, before threading rod 7.85mm ~ 8.0mm, thread rolling diameter of 7.0mm ~ 7.05mm, thread rolling posterior diameter 7.85mm ~ 9.95mm, and the rod diameter is similar to the naked eye looks both outside diameter in a foreign plane; the so-called rod and a half teeth, it means that before threading threading rod diameter is 7.0 ~ 7.05, threading the outer diameter of inflation to 7.85 ~ 9.95, while the light bar are the same, the naked eye looks tooth diameter than the rod to come to the rough. Of course, this we can draw: DIN931 standard bar and a half stainless steel coarse thread screw DIN933 stainless steel rod than half the cost of the dental screw in some more expensive.