活接头螺母 meaning in English

union nut

Fittings for domestic installation ; nonferrous metal union nuts
家用安装设备配件.有色金属活接头螺母
Non - soldering compression couplings - union nuts for butt joints
非焊接压紧联轴节.对接结构活接头螺母
Union nuts for cylindrical union
圆柱形活接头用活接头螺母
Fittings for domestic installation ; malleable cast iron union nuts
家用安装设备配件.可锻铸铁活接头螺母