Wenzhou Bona Industry Co.,ltd is the professional manufacturer of fasteners in China.Our featured products include Hex flange nuts,Square weld nuts,Nylon insert lock nuts,Hex nuts,Carriage bolts,Machine screw,Self-tapping screw in DIN, ANSI standard. We have a professional and united technical team, we can produce special fasteners according to customer''s drawing.We provide best quality and best service to customers all over the world.