Hexagon nut according to former DIN 46320, with Pg internal thread according to DIN 40430, glass fibre reinforced, with flame retardant, halogen-free. Nominal size: Pg 21 Height: 7 mm Wrench size: 36 mm Glow wire test according to DIN EN 60695-2-10+11/VDE 0471-2-10+11: 650°C Operating temperature range: -40° to 100°C Material: Polyamide Color: light gray RAL: 7035 (similar)