细牙全螺纹六角头螺栓 A级和B级
Hexagon Head Screws, with Fine Pitch Thread - Product Grades A and B
六角头螺栓 细牙 全螺纹
Hexagon Head Screws with Metric Fine Pitch Thread - Product Grades A and B
细牙六角头螺栓
Hexagon Head Screws with Metric Fine Pitch Thread - Product Grades A and B