It's a type of fastener consisting of a hexagon head and a screw (cylinder with full thread), which needs to be matched with a nut to fasten and connect two parts with through holes.
10 inch stage audio subwoofer speaker, Using 170mm ferrite magnet and aluminum frame, the whole speaker has moderate high frequency and medium high frequency, low distortion and good transient state. We can OEM and ODM. Welcome to contact us for cooperati