Some basic common sense of cap nut

Cap nut is a commonly used standard part. There is a cap on the nut. The function of the cap is to cover the exposed part on the outside of the fastening part to prevent moisture or corrosion from entering the interior, so as to play the role of rust prevention, or for fastening occasions with beautiful appearances, such as wheel nuts on cars. As the name suggests, the cap nut is a hexagon nut with a cover. The function of the cover is to fasten the exposed part on the outside to prevent moisture or other corrosive substances from entering, so as to play the role of rust prevention, and then improve the service time of itself and the connector.

The following is the content introduction

• The production process of cap nut

• Material of cap nut

• Use of cap nuts

The production process of cap nut

1. The integrated whole can be formed by the cold pier, and the products with large specifications and low output can be red beaten and then cut.

2. In the combined type, the nut body and the cap are in a split structure, and the two are connected through different connection modes. When the split structure is adopted, the nut body can adopt the existing standard nut. During processing, it is only necessary to connect the cap of the cold pier to the nut. This structure reduces the difficulty of manufacturing. There are many process methods of combined connection and many patented products.

3. The nut body and cap can be connected through riveting deformation, with poor sealing, certain gaps, and easy leakage at the connection.

4. The most commonly used combination connection of nut body and cap is welding, in which butt welding (i.e. butt welding) is a kind of resistance welding. It is to heat the connecting end of the nut and the cap to the plastic or melting state through current and form a permanent connection under the action of axial pressure.

Material of cap nut

The main raw materials used for cap nuts are carbon steel (including low carbon steel, medium carbon steel, high carbon steel, and spring steel), stainless steel (SUS201 SUS202 SUS302 sus303 SUS304 SUS316 sus416), alloy steel, zinc-aluminum alloy, e-Car iron, aluminum, copper, plastic, PVC, bakelite, nylon, etc.

When we use cap nuts, generally, the surface of cap nuts needs to be treated, including some surface treatment processes such as zinc plating, nickel plating, chromium plating, and Dacromet, so as to make them more rustproof and improve the service life of fasteners. Among these surface treatment processes, chromium plating is the best one. The products produced by chromium plating not only have smooth and bright surfaces. Moreover, the anti-rust and anti-corrosion time is also longer, which is comparable to that of stainless steel.

Use of cap nuts

Cap nuts are mainly used in tires and front and rear axles of automobiles, tricycles, electric vehicles, etc. to fix tires and front, rear, left, and right. They can also be used to fix the base of street lamp frame and some mechanical equipment that are often exposed to sunlight and rain

Ningbo yi pian hong Fastener Co., Ltd. was established in 2001, specializing in the production of all kinds of high-strength bolts, nuts, and threaded rods, with an annual production capacity of 30000 tons and an annual turnover of 300 million yuan. Products include ANSI / ASTM, DIN, BS, ISO, GB, JS, and other standards, which are mainly used in the field of high-strength seals and oil pipeline valves.