金属板用梅花自攻螺钉
iso14821983开槽沉头自攻螺钉slottedcountersunkheadtappingscrews
gbt1682421997六角法兰面自攻螺钉
内六角花形半沉头自攻螺钉
一字开槽盘头防锈自攻螺钉gb/t5282/st3.9*38/st4.2*50/st4.8*38
金属板用梅花自攻螺钉
iso14821983开槽沉头自攻螺钉slottedcountersunkheadtappingscrews
gbt1682421997六角法兰面自攻螺钉
内六角花形半沉头自攻螺钉
一字开槽盘头防锈自攻螺钉gb/t5282/st3.9*38/st4.2*50/st4.8*38