Introduction to hexagonal flange nuts

Introduction to hexagonal flange nuts

The hexagonal flange nut mainly includes a nut body, with a flange surface fixed at one end of the nut body and a cover cap fixed at the other end of the nut body; Due to the installation of a cover cap on the nut body, the hexagonal flange nut has good sealing performance when used, which can effectively prevent harmful substances such as rainwater, moisture, and dust from immersing in the nut body, prevent rusting of the nut body, and greatly extend the service life of the hexagonal flange nut.

Hexagon flange nut material: A3 low-carbon steel 35K high-speed steel wire rod 45 # 40CR 35Crmoa;

Hardness level of hexagonal flange nuts: Level 4, Level 5, Level 6, Level 8, Level 10, Level 12;

Surface treatment of hexagonal flange nuts: generally divided into two types: color zinc plating and white zinc plating, and generally cold electro galvanized;

Main specifications of hexagonal flange nuts: M5 M6 M8 M10 M12 M16 M20 (flange nuts above M20 and M14 M18 are not commonly used);

Hexagon flange nut thread specifications: refer to national standard nut threads;

Hexagon flange nut national standard code: GB6177-2000;

Usage characteristics of hexagonal flange nuts:

1. Piping: Use a pipe cutter or grinding wheel cutting machine (the cutting blade should be dedicated) to vertically cut stainless steel pipes according to the required length, clean the end burrs, and round them;

2. Welding: The left and right conical flange plates (with grooves, specifically designed for embedding flange sealing gaskets on both sides) are welded to the two pipe ports that need to be connected using tungsten argon arc welding (TIG welding);

3. Gaskets: Double sided flange sealing gaskets are lined between the left and right flange pieces;

4. Tightening: Clamp two flange plates with clamps, and then use fastening screws (hexagon socket bolts) to clamp the flange or tighten the handle (one end of the external thread is connected to the internal thread of the handle, and the other end is connected to the fixed rivet for flexible connection).

The inspection difficulties of hexagonal flange nuts include tooth defects, hexagonal opposite corners, and dimensions.

45 degree lateral imaging of the first site: detection of internal teeth;

Second site side image: detecting the total height of nuts and flange height;

Image on the third site: detecting hexagonal diagonal;

Image at the fourth site: detecting the diameter of the inner hole and flange.