凹头螺钉 meaning in Chinese

socket (head) screw;socketed screw

Specification for hexagon socket head cap screws - metric series
六角凹头螺钉规范.公制系列
Hexagon socket head cap screws with metric fine pitch thread
有米制细螺距螺纹的六角凹头螺钉
Standard specification for stainless steel socket head cap screws
不锈钢凹头螺钉螺丝的标准规范
Bits with square drive for hexagon socket screws , hand operated
手动式六角凹头螺钉用方形驱动刀头
Standard specification for stainless steel socket head cap screws metric
不锈钢凹头螺钉螺丝的标准规范

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