material | Alloy Steel |
grade, rigidity | grade 8.8 |
Coating | black oxide coating |
材料:碳钢、合金钢,等级:4.8、8.8、10.9、12.9,表面处理:发黑,公称直径:M10-M56;公称长度:50-500MM Material:carbon steel, alloy steel,Grade: 4.8, 8.8, 10.9, 12.9, surface treatment: black, nominal diameter: M10-M56 |