DIN 7991 10,9 zinc plated black countersunk head Bolt and hexagon socket

The countersunk head bolt - is a fixture consisting of a metric thread and a slotted head for various types of nozzles.

Scope The DIN 7991 bolt is used for connection and fastening of details, designs in construction and mechanical engineering.

Material high-strength structural alloy steel. High strength class 10,9 allows the use of bolts for high-load connections.

Coating: black zinc cloth. Main characteristics of this coating:

• Organic black topcoat;
• Excellent corrosion protection;
• High hiding power on silver and black base coatings;
• Attractive uniform black appearance;
• Very good chemical resistance; increased UV resistance;
• Excellent adhesion, i.e. the coating does not peel, crack or flake even under mechanical stress or chemical attack;
• Integrated lubricant component for controlled friction characteristics;
• No hydrogen embrittlement;
• Excellent corrosion resistance in NSST and cyclic corrosion tests.

Analog ISO 10642