... are widely used in furniture, car, ship, electron and other fittings of industrial products. types: flat head ,countersunk head, round body ... , hex body, open end, closed end, body with ribben, body with groove and so on . also we can produce according ... /32 3/16,1/4,5/16,3/8 . Material: steel, stainless steel, brass,aluminium. We specilize in producing it . And have productive ...