内六角圆柱头螺钉 Hexagon socket head cap screws ; hexagon socket cap screws ; socket head cap screws ; Hexagon socket cap head screws

内六角平圆头螺钉 Hexagon socket button head screws

内六角圆柱头轴肩螺钉 Hexagon socket head shoulder screws

内六角花形圆柱头螺钉 Hexalobular socket head cap screws

内六角圆柱头机械螺钉 HEX SOCKET HEAD CAP SCREW