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jianiu@jianiufasteners.com
Hebeipu Industrial Zone, Yongnian District, Handan City, Hebei Province
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DIN912Hexagon socket bolt with cylindrical head

 

ISO7380 Half round head hexagon socket bolts

 

GB901-1988 double head bolt

 

bolt、nut、washer

 

GB97 High strength flat

 

GB1228 Large hexagonal steelstructural bolts

 

GB3632 Torsional shear steel structural bolts

 

GB6170 High strength outer hexagon nut

 

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