... series Size: 5*5~50*50mm. Surface:bright,polishe,pickled Stainless Steel Square BarStainless Steel Square/ Flat/ Round / Triangle / Hex BarSpecification:------------------------------------------------------------------1.Standards: GB AISI2 ... . Application: Widely used for manufacturing Spring, Screw, Bolt & nut, Steel mesh/coveyer belt, Shaft pin, Needle, Nail, Rope, Earphone wire, Washer, Staples ...