... types of nuts bolts: 1Materials:Carbon steel 2Size:M20*40,50,90 3Standard:AS,DIN,ASTM,etc. 4Certificate:ISO9001:2008,SGS Fasteners ... the product:1Materials: Carbon steel 2Size: M20*40, M20*50, M20*90 3Standard: AS,DIN,ASTM,GB,etc. 4Grade: 8.85Surface ... certificates:3.product: The following bolts: M20*40, M20*50, M20*90 4. Factory view figures: PackagingFactory viewTesting equipmentsWorkshop Welcome your ...