DIN 912 12.9 zinc placket black Bolt with cylindrical head and internal hexagon

A fine pitch cylindrical head bolt is a fastener consisting of a metal stud with a fine pitch metric thread and a high cylindrical head with an INBUS (hexagonal) slot.

The DIN 912 bolt is used for connecting and fastening parts and structures in construction and mechanical engineering.

The material of manufacture is high-strength steel. The high strength class 12.9 allows the bolts to be used in highly loaded connections.

Coating: black zinc plating.

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;
• Built-in lubricant component for controlled friction characteristics;
• No hydrogen embrittlement;
• Excellent corrosion resistance in NSST and cyclic corrosion tests.

Analogs of GOST 11738-84, ISO 4762, PN 82302.