Name: Insidej Hexagon Bolt
Material: carbon steel, stainless steel(304)
surface finish : self color - carbon steel, stainless steel;
polishing - stainless steel
zinc plated(electric galvanized), hot dip galvanized
grade : 4.8, 8.8, 10.9, 12.9- for carbon steel
不锈钢普料、304,碳钢4.8级,8.8级,10.9级,12.9级内六角螺栓