1.surface treatment:plain ,zp,black, H.D.G 2.finish:4.8-8.8 3.iso9001:2000 4.material:carbon steel, Alloy steel. 1.surface treatment: plain, zpl(white, bluish, white), black, Environmental galvanized (cr3+zinc),hot-dip galvanized,dacromet2.grade: 3.6,4.6,4.8,5.6,5.8,6.8,8.8,10.93.material:carbon steel,35#,45#Alloy steel, 4142 A234 WP5, A234 WP11, A234 WP12.A234 WP22.A234 WP9.A234 WP914.size: m6- ...