Nut,steel nuts,NUTS Certification:ISO9001:2008. Quality:grade 8.8.9. ... .9 Attractive price nuts The more the cheaper nuts Nut,steel nuts,NUTSFeatures:Certification:ISO9001:2008Place of origin:Fujian,ChinaDiameter:12mm ... .9Brand of bolt:jinliang,jiajin,u brandMaterial: mild steel,1035steel,1045steel,5140steelSurface protection: paint, black oxide, zinc plated, phosphate, electrophoresis, polishing etc ...