Hex socket cap screw according to ISO 4762 / DIN 912, strength class 12.9, plain (uncoated) surface. The plain finish is used in dry or controlled environments or when the screw will later be coated, for example with painting, flake coating, or hot-dip galvanizing (HDG). Class 12.9 screws provide extremely high tensile and clamping strength and are used in high-load mechanical joints such as machinery, tools, and steel structures. Available in multiple lengths and variants from SWEBOLT & BOTNIA BOLT.