1 Our main prouduct: Nut: DIN934 GB52-76 GB6170 Bolt:DIN933 GB21 GB30 GB57832 Size: M6--M303 Steel Gread: A3 35K4 Surface For Steel Items: Plain, Zinc Blue, Zinc Yellow, Zinc White, Phosphated5 Class:4 , 6 ; 4.8, 6.8 Used in electric power, mining, transportation, building, machinery manufacturing, construction, electronics industries. Yan Zhao Fastener Manufacturing Co., Ltd. is a modern enterprise. specialize in the production of DIN & GB optical hexagon bolt, nuts. We have the most advanced cold heading machinery and equipment, first-class technical talent and rigorous product quality assurance. Uphold the principle of equality and mutual benefit, the enthusiasm with you, if required please contact
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1 Our main prouduct: Nut: DIN934 GB52-76 GB6170 Bolt:DIN933 GB21 GB30 GB57832 Size: M6--M303 Steel Gread: A3 35K4 Surface For Steel Items: Plain, Zinc Blue, Zinc Yellow, Zinc White, Phosphated5 Class:4 , 6 ; 4.8, 6.8 Used in electric power, mining, transportation, building, machinery manufacturing, construction, electronics industries. Yan Zhao Fastener Manufacturing Co., Ltd. is a modern enterprise. specialize in the production of DIN & GB optical hexagon bolt, nuts. We have the most advanced cold heading machinery and equipment, first-class technical talent and rigorous product quality assurance. Uphold the principle of equality and mutual benefit, the enthusiasm with you, if required please contact