Hex Flange Nut

Product Introduction

• Standard Name: Hexagon Nut with Flange or Flange Nut.

• Common Names: Washer Nut, Hex Flange Nut, Serrated Nut.

• Product Definition: A hex nut featuring a wide flange (washer) at one end. Its core design integrates nut and washer functions, effectively distributing pressure through an enlarged contact surface to prevent surface crushing of connected components and provide superior anti-loosening performance in vibrating environments.

Hex Flange Nut Key Features

• Integrated Flange Design: Built-in wide flange (smooth or serrated) at the bottom evenly distributes

  the load, eliminates the need for a separate gasket, improves connection stability, and enhances

  anti-loosening performance.

• Hexagonal Shape: Standard hexagonal shape for easy tightening with wrenches or socket tools,

  ensuring efficient installation.

• Materials and Coatings: Commonly made of carbon steel, stainless steel, or alloy steel, with finishes

  including zinc plating (ZP), hot-dip galvanizing (HDG), or blackening, providing different levels of

  corrosion resistance; strength grades such as Grade 5, 8, or A2-70.

• Diverse Sizes: Diameters M5-M36, supporting standard or heavy-duty flanges, conforming to standards

  such as DIN 6923 and ISO 4161.

• Advantages: Saves assembly time, vibration-resistant and anti-loosening, economical and practical;

  the serrated design is particularly suitable for vibrating environments.

Working Principle

• Threaded Fit — The internal thread matches the bolt, generating axial clamping force through rotation.

• Load Distribution — The flange increases the contact area, evenly distributing pressure and preventing

  material deformation; the serrated flange's embedded surface increases friction, resisting loosening.

• Anti-Loosening Mechanism — The flange provides mechanical locking, maintaining preload under

  vibration; the principle involves increased friction coefficient and elastic deformation.

• Installation Control — When torque is applied, the flange ensures stability, preventing overtightening

  and damage to the connection surface.

Product Applications

• Automotive Industry — Secures engine, chassis, or suspension components, resisting vibration and

  simplifying assembly.

• Machinery Manufacturing — Assembles equipment, pumps, valves, or conveyors, providing a

  stable connection.

• Civil Engineering — Connects steel structures or pipe flanges, evenly distributing force.

• Electronics and Electrical Appliances — Secures housings or brackets, saving space.

• Industrial Equipment — Used in heavy machinery or production lines, cost-effectively as a

  standard accessory.