Standard screws refer to screws with standard specifications such as national standards, ISO international standards, American standards, British standards, Japanese standards, German standards, etc. Non standard screws are derived from standard screws by upgrading their function, shape, and performance. Unlike standard screws, standard screws have stronger universality, but non-standard screws have stronger specificity. Generally, a non-standard screw is produced, They are all produced for a certain product, and their performance is more in line with the product design.

Why are non-standard screws more expensive than standard screws?

On the one hand, it is because non-standard screws test the production strength of manufacturers, and not all manufacturers have the production capacity of this non-standard screw. On the other hand, it also has some special dimensions and strength requirements, and some even have requirements for its thread pattern and screw, including its accuracy, strength, and process performance, which naturally makes the price more expensive.

Before customizing non-standard screws, it is necessary to understand their specifications

Screw specifications, head size specifications, height specifications. If it is the size of the hexagonal socket screw, it also needs to involve the size of the angle, the diameter, the material used, and the price will vary. So if we are planning to purchase non-standard screws, we still need to strictly review this section in order to select more suitable products.

Common non-standard screw types and usage scenarios:

1. Embedded screws are mainly used for hanging and fixing air conditioning pipes, water pipes, electrical pipes, ceilings, etc.

2. Twisted flat head non-standard screws can be used on cement concrete, brick walls and Concrete masonry unit to fix sanitary equipment.

3. Internal forced non standard screws with internal teeth, used for fixing marble, water pipes, electric pipes, and angle iron.

4. Sleeve type non-standard screws are mainly used for fixing soundproof walls and bathroom equipment.

5. External forced internal teeth non-standard screws are mainly used for hanging pipes of water pipes, electrical pipes, air conditioners, as well as fixing various angle irons and steel sections.

6. Twisted sleeve non-standard screws are used for fixing lighting fixtures, light steel dragon frames, and bathroom equipment.

7. Hollow non-standard screws are suitable for fixing door frames, cabinet frames, bathroom accessories, and wall decorations.