Handan Haosheng Fastener Co.,Ltd. ,founded in 1996, is a large and professional manufacturer of high-strength fastener in China,and everymonth output 2000 tons. Now we have advanced forged machine,heat treatment and Spheroidizing annealing equipment. Our factory mainly produce all grade (4.8, 8.8 ,10.9, 12.9)hex bolt, socket cap screw, structure bolts and hex nut. Such us DIN933, 931,960, 961, 6914 912. ANSI B18.2.1 ,A325 A325M,A490, A490M ,BSW916 etc.