Fastener knowledge: knowledge of flange nuts

What is a flange nut?

Definition of flange nuts, we generally call nuts with hardware hexagonal flanges as flange nuts. Flange nuts are also commonly used. Generally, many screws and bolts need to be matched with flange nuts. And if flange nuts are used, the tightening aspect is very good. There is a flange surface that works well with screws and bolts. The tightening performance is much better than that of hex nuts.

The basic knowledge of flange nuts is introduced as follows: Flange nuts are made of iron and stainless steel. But iron is more commonly used. It can also be electroplated according to the color required by the customer. General electroplating treatment has environmental protection and non-environmental protection. There are environmentally friendly color zinc, environmentally friendly nickel, environmentally friendly blue zinc, environmentally friendly black zinc, etc., as well as ordinary electroplating, white zinc, color zinc, black zinc, white nickel, etc.

English name of flange nuts: Hexagon nuts with flange;

Other names of flange nuts: nut with gasket, tooth nut, hexagonal flange nut, flange nut, etc.;

Flange nut function or purpose: mostly used in pipe connections or workpieces that need to increase the nut contact surface;

Flange nut material: A3 low carbon steel 35K high speed steel wire 45# steel 40CR 35Crmoa;

Flange nut hardness level: Level 4 Level 5 Level 6 Level 8 Level 10 Level 12; (Guide: Fastener Knowledge: Three Safety Points for Tower Crane Bolts)

Flange nut surface treatment: generally divided into two kinds of color zinc plating and white zinc plating, and generally cold electrogalvanized;

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

Flange nut thread specification: refer to the national standard nut thread;

Flange nut national standard code: GB6177-2000;

Flange nut use characteristics:

1. Piping: Use a pipe cutter or a grinding wheel cutter to cut the stainless steel pipe vertically according to the required length, trim the end burr, and make it round;

2. Welding: the left and right tapered flange flange pieces (with grooves, specially for embedding the flange gasket on both sides) are respectively connected with the two piping ports that need to be connected, using tungsten argon arc welding (TIG Welding) welding;

3. Gasket: double-sided flange gaskets are lined between the left and right flanges;

4. Fastening: clamp the two flanges with a clamp, and then use a fastening screw (hexagon socket bolt) to clamp the flange or fasten the handle (one end of the external thread is connected with the internal thread of the handle, and one end wears a fixed rivet Active connection).

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