The adjustable screw rod is used in engineering construction, bridge construction and scaffolding. Play the role of top and bottom support. Therefore, according to different functions, it is mainly divided into two types: top support and base. Hollow screws have two specifications: 34mm and 38mm, and solid screws have two specifications, 30mm and 32mm.

Different construction screw manufacturers will have differences in product price positioning, and the brands they provide will also be different, so how to choose cheap and high-quality building materials from them, it is best to have more understanding of the manufacturer , To have a better understanding of the quality of its products, these are all crucial parts.

In order to obtain better quality assurance, it is important to choose a higher quality construction screw supplier. After all, they know which equipment is better and the price is more reasonable, so in the final analysis how to make a better choice is very important, and must be combined Actually, carry out reasonable disposal, otherwise the effect will be greatly reduced.

The construction screw is used to improve the overall stress transfer of the bracket, so the quality and close integration of each component are related to the use effect, so the product should meet the following requirements during the production and processing process:

1. The processing of steel sleeves should be carried out only after the process has passed the inspection.

2. Water-based lubricating fluid should be used for the processing of steel wire ends, and oily lubricating oil should not be used.

3. The pitch diameter of the thread head, the tooth profile angle and the effective thread length should meet the design requirements. The size of the thread head thread should be determined in accordance with GB/T196, and the effective thread pitch diameter should meet the requirements of GB/T197 for 6f grade accuracy.

4. After the wire end is processed and passed the inspection, the protective cap or sleeve should be put on immediately to prevent damage to the wire end when loading and unloading the rebar.

Hollow screw is a kind of construction screw. The screw pipe is hollow in section. It is an innovatively designed new type of construction screw product with light weight and strong load-bearing capacity based on the original solid screw. Hollow screw rods are divided into two types: bottom support hollow screw rod and base hollow screw rod from the position of action. The function of the screw rod is to transfer the stress of the building, so the quality problem is very important.

We judge the quality of the hollow screw firstly to see whether it meets the national standard. However, some technical management, procurement and construction personnel have little understanding of the national standard of the hollow screw, and it is difficult to judge the quality of the hollow screw when purchasing. Pros and cons.