model:006 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 main scoop of inventories:1.materials:low/middle carbon steel(4.6) alloy steel(8.8-12.8)stainless steel 304 & 316 2.dimensions:a)low/middle carbon steel,alloy steel m8-m64 b) stainless steel 304 & 316 m5-m30 3.cut precious after hot forging,manufacture mainly adopts the method of hot forging,cold forging few;tensile strength of stainless steel 304&316(other materials are also available in a small amount.)