... Channels Ecrou rail-channel fastenersfor the rail struct 41*41 size M8*40,M8*50,plate size:34.5*19*6M10*30M10* ... 40,M10*50,M10*60,M12*60,plate size:34.5*19*8For time-saving, efficient fixing of Pipe Clamps ... the professionalFor insertion at any point into the slot of Channel Support sections 38/24, 38/40, 39/52, 40 ... and thread diameters can be combined within the same channel Hammer-head fastener