内六角螺钉 SOCKET HEAD CAP SCREW 六角螺钉 HEX HD SETSCREW 六角螺栓 HEX HD BOLT 挡圈 closing ring 弹性挡圈 circlip 轴承隔套 distance sleeve of axletree 轴承 axletree 深沟球轴承 DEEP GROOVE BALL BEARING 无扣长 non-buckle longth 弹簧 ...