Shanghai Jinrui owes total assets of RMB 50 million with area of 5000㎡. The business covers 18 countries from five continents.Now three branches of Shanghai Jinrui are Shanghai Xingrui Bolt Factory,Website:http://www.chinajinrui.net, Shanghai Xingrui Wire Steel Factory, and Shanghai Xingrui Hot heading Factory.GB flange nut is hex with washer side, mainly in the field of machinery and equipment, construction, automobile, railway and other industries. Nut mechanical property has grade 4, grade 6, grade 8 and grade 10. GB flange nut covers the dimensional requirments of metric series hex nut. The common standard of GB flange nut is GB/T6177.1 . Its size from M3-M64 diameter. StandardGradeFinshGB/T6177.1 flange nut4white zincyellow zinc  black oxideH.D.GDacromet...6810