JINGLEFAST INDUSTRIAL CO., LTD IS THE MERGER OF DAYANG FASTENER FACTORY AND JINGGONG STANDARD PARTS FACTORY, WHO IS ISO9001 PROFESSIONAL FASTENER FACTORY FOUNDED IN 2000, SPECIALIZED IN THE PRODUCTION FOR HEX BOLTS, CARRIAGE BOLTS, HEX FLANGE BOLTS, HEX LAG SCREW, THREAD RODS, HEX NUTS AND WASHERS...