This type of screw can be used in chipboard and soft wood types without predrilling, due to its thin core diameter and sharp angle of the thread.
Zinc or zinc alloy electroplating is by far the most common surface coating for steel fasteners.
Hexagon head screw ISO 4017 Steel Right Zinc plated 8.8 M16X50
Hexagon nut DIN 934 Steel Right Zinc plated |8| M16
Plain washer DIN 125-1A Steel 140HV Zinc plated M16
Threaded rod length 1 meter DIN 976-1A Steel Zinc plated 8.8 M16
Prevailing torque type hexagon nut with non-metallic insert DIN 985 Stainless steel A2 Right M6