... /35Cr-Mo 2.Surface: Black, ZP, HDG,Plain 3. Size: M5-160 4. Grade: 8.8,10 ... .9 Tortous type high strength bolt,nut and washer for steel structures >> We manufacture ASTM E1852 & GB ... Black, zinc-galvanization, hot dip galvanization, electro galvanization,plain 3. Size: M5-160 and according to customers' requirements ... buildings, hoisting machinery and so on. SETS OF TORSHEAR TYPE BOLTS AND NUTS\10.9