Extreme-Strength Metric Class 12.9 Steel Hex Head Screws
Choose these Class 12.9 steel screws for heavy duty stamping applications as well as earth-moving machinery such as bulldozers and excavators. With a tensile strength of 170,000 psi, they are 10% stronger than our other metric steel screws. Dimensions meet ISO 4017 (formerly DIN 933) specifications. Length is measured from under the head.
Zinc yellow-chromate plated steel screws resist corrosion in wet environments.