内外牙螺母自攻螺套安装工具扳手牙套螺丝套302/307/308牙套螺丝 碳钢发黑加硬M2

302型碳钢开槽自攻螺套内外牙螺纹保护护套牙套M2M2.5M3M4M5M8M10 碳钢M4*0.7-M6.5*0.75-8mm(10

302碳钢开槽型自攻螺套/内外牙螺纹护套牙套M2M2.5M3M4M5M6M8M10 M2*0.4-M4.5*0.5*L6(100颗)