China Heavy Structural Hex Bolts and Steel Fastener
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Hot-selling Heavy Hex Bolt A325/A490
The DIN933 is a German standard bolt, similar to the national standard number GB5783. The material is generally carbon steel, and the main grade is divided into 4.8,5.8,6.8,8.8,10.9,12.9 grades. Surface treatment: natural color, galvanized, black, nickel-plated.