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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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Open the phone to scan QR code