Basic knowledge of custom machine screw

Custom machine screw tolerances are generally indicated by numbers plus letters. Numbers represent precision. Letters represent tolerance bands. Internal threads are indicated by uppercase letters. External threads are indicated by lowercase letters. H is the base hole system. The inner thread tolerance band is used as the reference. The external thread is matched according to the actual use requirements.

Custom machine screw, flat front end, small pitch, uniform, generally used to fasten metal and machine parts.

The machine screws can be divided into longitudinal fastening screws and transverse expansion screws;

custom machine screw and triangular thread screws (60 degrees) The difference is that the triangular threaded screws are self-tapping screws, also called triangle self-locking screws, or triangular screws. The thread of the teeth is triangular in shape. It is a special type of self-tapping screws, the thread is a common thread with a curved triangular cross section, the thread surface also has a high hardness, the screw is characterized by low screwing torque and high locking performance.

If you don’t understand, you can contact Shishitong Metal Products Co., Ltd., custom machine screws, custom screws welcome inquiry!

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