2020BS EN ISO 3506-2:2020 Fasteners. Mechanical properties of corrosion-resistant stainless steel fasteners - Nuts with specified grades and property classes
2009BS EN ISO 3506-2:2009 Mechanical properties of corrosion-resistant stainless steel fasteners - Nuts
1998BS EN ISO 3506-2:1998 Mechanical properties of corrosion-resistant stainless-steel fasteners-Nuts