Standard: GB52Surface Treatment: GalvanizedProduct grade: Class AStrength level: Level 4.8Product specification: m6 (approximately 5kg pieces per pack), m8 (approximately 5kg pieces per pack), m10 (approximately 5kg pieces per pack), m12 (approximately 5kg pieces per pack), m14 (approximately 5kg pieces per pack), m16 (approximately 5kg pieces per pack), m18 (approximately 5kg pieces per pack), m20 (approximately 5kg pieces per pack), m22 (approximately 5kg pieces per pack), m24 (approximately 5kg pieces per pack)Purpose function: Locking: Q235 (carbon steel)