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12.9级细牙黑色凹端内六角机米螺丝紧定止付螺栓顶丝M2/M4/M5/M6
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紧定螺栓紧定螺丝12.9级高强度DIN916凹端喉塞内六角紧定螺钉
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12.9级凹端紧定内六角螺丝 M3M4M5M6M8M10M12 机米顶丝无头螺栓钉
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304不锈钢平端凹端内六角机米螺丝DIN913内六角无头紧定螺钉
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2 4 6 8 10# 1/4~5/8UNC英制紧定螺丝无头机米止付美制凹端内六角
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√按包316凹端紧定(DIN916)
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304不锈钢内六角凹端尖端 紧定/顶丝/机米螺丝无头内六角
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√按包304滚花凹端紧定(DIN916K)
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12.9级DIN916凹端内六角紧定螺丝止付无头GB80M2M2.5M3M3.5M4-M24
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304不锈钢凹端紧定DIN916机米顶丝无头M2M2.5M3M4M5M6M8M10M12M16