... 9,12.9 Tortous type high strength bolt,nut and washer for steel structures >> We manufacture ASTM ... galvanization, electro galvanization,plain 3. Size: M5-160 and according to customers' requirements 4. Grade: 8.8 ... GOST ASME. Also can be with customers' drawings and requirements. 6. Payment:L/C,T/T >> ... ,high civil buildings, hoisting machinery and so on. SETS OF TORSHEAR TYPE BOLTS AND NUTS\10.9