The carriage bolt is not one of our common standard screws and has a wide range of uses. It is widely used in many electronics, electrical appliances, machinery manufacturing, and furniture production. When we manufacture carriage screws, there are two commonly used processes, one is The common one is the cold heading process, also known as the cold forging process, and the other is the red forging process, also known as the red forging process.

When the cold pier process is used to produce carriage screws, a cold pier machine is used to directly use the drawn wire, and it is a production method that is directly extruded through a cold heading die. It is used by most fastener factories when producing carriage bolts. , Relatively speaking, the cost is lower, the efficiency is faster, and it is easy to operate, which saves a lot of labor costs, and is suitable for the production and manufacture of small-sized carriage screws. Under normal circumstances, the carriage bolts below the specification M16 are generally cold-pierced or cold-punched.

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