Material composition: Connector, square washer: DD11 MOD - HN 547, S235JR - DIN EN 10025; washer: DIN EN ISO 7089; bolt: 8.8 grade steel; nut: 8 grade steel
Surface finish: HDG: connector, square washer 55 µm - DIN EN ISO 1461; bolt, nut 45 µm - DIN EN ISO 1461