Hex Bolts, Carriage Bolts, Timber Bolts manufacturer / supplier in China, offering DIN7983 Stainless Steel Phillips Countersunk Head Self Tapping Screw, JIS B1122 Stainless Steel Phillips Cross Recessed Pan Head Self Tapping Screws, ISO 7044 Carbon Steel Zinc Plated All-Metal Hexagon Nuts with Flange and so on.