How many types of car bolts are there? What does the number on it mean?
Bolts are the most used parts in cars, and many auto mechanics jokingly call themselves "screw-screwers". If you look closely at the bolts, you will see that the bolts come in a variety of different shapes and have different numbers on the bolts. What does all this mean? Today we will talk about the knowledge of automotive bolts.
Bolts are the most used parts in cars, and many auto mechanics jokingly call themselves "screw-screwers". If you look closely at the bolts, you will see that the bolts come in a variety of different shapes and have different numbers on the bolts. What does all this mean? Today we will talk about the knowledge of automotive bolts.
According to the detour direction of the thread: it is divided into two types: left-handed thread and right-handed thread. The vast majority of threads are right-handed threads, and a very small number of special parts use left-handed threads.
How many types of car bolts are there? What does the number on it mean?
According to the number of threads, it can be divided into single-wire thread, double-wire thread and three-wire thread, of which single wire is mostly used for connection, and the other is mostly used for transmission.
How many types of car bolts are there? What does the number on it mean?
According to the shape of the thread, it is divided into triangle thread, rectangular thread, trapezoidal thread and zigzag thread. Among them, the triangular thread has good self-locking and high strength of the threaded teeth, which is generally used for joining and is the most widely used thread. According to the pitch is divided into two categories: coarse teeth and fine teeth, coarse tooth thread is the basic thread, fine tooth thread screw strength is high, but the strength of threaded teeth is lower than coarse tooth thread, generally used in thin-walled pipe fittings, shaft parts and precision mechanism adjustment parts. When the screw diameter is greater than 70mm, only fine tooth threads can be used.
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