ID: 17.0 mm OD: 25.4 mm Thickness: 3.4 mm Steel type: EN 1.7182 or equivalent Threatment: Trought Hardened Surface coating: Delta Protekt base coat (KL100) and top coat (VH302GZ) Washer hardness: ≥ 465 HV1 Corrossion resistance: Minimum 600 hours in salt spray test (according to IS09227) Bolt grades: Up to 12.9 Temperature range: -20°C to 200°C