1.Place of origin: Jiangsu,China(mainland) 2.Brand:ZG 3.Standard:DIN912,ISO4762 4.Size:All Grade 12.9 DIN912 Soket Head Cup Screw 1.Material:GR1,GR2,GR3,GR4,GR5,GR7,GR9,GR12,GR232.Stregth Class:4.8,8.8,12.93.Salt Spray Test: Surface is in good Condition After 24-26 hours4.Application: Machine Manufacturing , Bycycle, Car and Most Important Nuclear Power and so on .5.Size:M1.6-0.35*2-M48-5.0*5006. ...