DIN flange nut also as DIN standard flange nut,Website:http://www.chinajinrui.net,has mechanical property grade 4, grade 6, grade 8 and grade 10, is widely used in the field of machinery and equipment, construction, automobile, railway and other industries. DIN flange nut is different from normal hex nut, also including coarse thread and fine thread. The common standard of DIN flange nut is DIN6923. Its size arranges from M3-M64 diameter.StandardGradeFinshDIN6923 flange nut4white zincyellow zinc  black oxideH.D.GDacromet...6810