China wholesale Small Hexagon Head Bolt - DIN7991 Hexagon socket countersunk head screw – Tiancong

Product Description

Hexagon socket countersunk head screw is also known as the flat cup inside the hexagonal screw, common in the British system and metric system, commonly used materials are stainless steel and carbon steel. The screw head is round outside the head, and the middle is a concave hexagonal. Its head is a 90-degree vertebra. After installation, the screw head can fall into the mounting surface, keeping the mounting surface level.

Hexagon socket countersunk head screw is commonly used in machinery, mainly easy to tighten, disassembly, not easy sliding Angle and other advantages. The inner hexagonal wrench is generally a 90-degree bend, the curved end is long side short, with the short side screw, holding the long side can save a lot of force and can play a good fastening role.

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