... : 20-500 Property Grade:10.9 Materials:20MnTiB Hex bolt zinc plated low price hex bolt/bolts nuts and bolts/fasteners1. Standard ... , 4.6, 4.8, 5.6, 5.8, etc. 4. Material: carbon steel, alloy steel, stainless steel, etc. 5. Surface: plain ... , white and blue), black, HDG, etc.6. Length: 10mm-300mm Hex bolt zinc plated low price