六角凹头螺钉 heoagon socket screw ; hexagon socket head screw
凹头螺钉键 socket screw key
六角凹头螺钉键 hex socket screw key
三角形凹头螺钉 riangle socket head screw
内六角凹头螺钉 Hexagon socket head cap screws
六角凹头固定螺钉 hexagonal hollow set screw ; hexagon socket set screw
凹槽椭圆头螺钉 oval fillister-head screw
米制凹头定位螺钉 Metric series socket set screws
六角凹头平头螺钉 Hexagon socket head cap screws
六角凹头紧定螺钉 Hexagon socket set screws
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