... ,Gr9,Gr12, etc.2.Standard: GB,DIN, IFI,UNC,UNC,JIS, BS,BSW ,ISO3.Specification:Screw:M3-M24 Bolt: M4-M64 ... -4V),Gr7,Gr9,Gr12, etc.StandardGB,DIN, IFI,UNC,UNC,JIS, BS,BSW ,ISOSpecificationScrew:M3-M24Bolt:M4-M64*L6—300mmNut: M4 ... by QC before deliverySampling inspection for Chemical composition and Michanical properties like Tensile strength etcDimension measurements like Thread size,Height of ...