Hex Bolts and Nuts 1. Material: 35k,q235, c1010 2. Surface: ... ,6.8,8.8 4. Standards: DIN933/931 Hex Bolts and Nuts1. Material: 35k,q235, c10102. Surface: Black, ZP, ... Is a private corporation, which is specialized in producing and selling fasteners.The company was established in 1999,located ... the good service. We always invest to improve the technology and the quality to meet the demand of the market ...