Model:004 The spherical surface is very smooth,the precision of screw thread is high. As accessory it can improve integrated quality for your product. Material:low/medium carbon steel,stainless steel,structural alloy steel Technological process:cut precious after hot forging Specification:Common American system Grade: 4.6-12.8,etc Features: 1) Plating:plated Zinc various/BLACK(BLUE) OXIDE etc. 2) Standards:DIN 444(DIN444),GB 798(GB798),M8-M64 Free sample! High quality and best price. Main[...]

Model:003 The spherical surface is very smooth,the precision of screw thread is high. As accessory it can improve integrated quality for your product. Material:low/medium carbon steel,stainless steel,structural alloy steel Technological process:cut precious after hot forging Specification:Common American system Grade: 4.6-12.8,and so on. Features: 1) Plating:plated Zinc various/BLACK(BLUE) OXIDE etc. 2) Standards:DIN 444(DIN444),GB 798(GB798),M8-M64 Free sample! High quality[...]