(Standard): GB5782/5783, DIN931/933, DIN960/961, ASME B 18.2.1 (Grade): 4.8, 6.8, 8.8, 10.9, 12.9, A2, A4, B7(Surface Finished): Black, Phosphating, Zinc Plated, HDG (Size) M5 - M100 (Material) Q195, Q235, 10B21, 35K, 45#, 40Cr, 35CrMo, 42CrMo, B7, SS304, SS316,