... etc 2.Material: Stainless Steel or Carbon Steel Stainless Steel Bolts Product Description: 1. Material: Stainless Steel or Carbon Steel2. Head mark ... . Example: DIN912, DIN931, DIN933, DIN571, A-10, A-6, ISO4014, ISO4017, etc8. Production Processing: Cold forged or Hot ... , etc12. Mould: We open by ourself13. Usage Scope: Steel plate, Guardrail and railway etc industrial scope14. Packing: General ...