Stainless steel hex screws are the most frequently used type of stainless steel standard parts. The main function of the external thread is to match the nut. Using this threaded connection method, the two parts are integrated. Material: SUS304/SUS316 stainless steel Stainless steel hex screws currently produced or sold and the standards used include: Hex head full teeth stainless steel screw DIN933/GB5783/ISO4017/ANSIB18.2.1/JISB1180 Hex head half tooth stainless steel screw DIN931/GB5782/ISO4014/ANSIB18.2.1/JISB1180 Hex head SUS316 stainless steel screw, thin rod half tooth stainless steel screw GB5784 The above two types of half-toothed screws, although they are also half-toothed, are divided into thick rods and thin rods. The thick rods and half-toothed teeth mean that the stainless steel screws are larger than the squeezing teeth before the squeezing of the stainless steel screws. For example, the M8 screw has a diameter of 7.85mm~8.0mm for the anterior teeth and 7.0mm~7.05mm for the gingival diameter. The outer diameter of the posterior teeth is 7.85mm~9.95mm, which is similar to the diameter of the polished rod. The outer diameter is on the outer plane; the so-called thin rod half tooth means that the front pole of the tooth decay is 7.0~7.05, and the outer diameter is expanded to 7.85~9.95 after the tooth decay, while the polished part is unchanged, the naked eye It seems that the outer diameter of the tooth is thicker than that of the polished rod. Of course, we can also conclude that the DIN931 standard stainless steel thick rod half-tooth screw is more expensive than the DIN933 stainless steel thin rod half-toothed stainless steel screw. Small-Size Valve Balls,Stainless Steel Hollow Valve Balls,Steel Hollow Valve Balls,Stainless Steel Hollow Valve Spheres WENZHOU ZHENHONG VALVE BALL CO., LTD , https://www.zhvalveball.com