| Customization: | Available |
|---|---|
| Finish: | Hot Dipped Galvanized |
| Grade: | 4.8 |
|
Still deciding? Get samples of US$ 10/Piece
Request Sample
|
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
| Product Name | Hot dip galvanized expansion bolt |
| Specifications | Customizable |
| Delivery Time | Usually Takes 30-45 Working Days |
| Surface Treatment | Ordinary, Black Oxide, Galvanized (Yellow), HDG |
| Size | According to Specific Models |
| Quality Assurance Certificate | ISO 9001:2015 Quality System Certification Enterpr |
| Length | Customizable |
| Product grade | A |
Expansion screw is a commonly used fastening connector, mainly used to fix objects on various substrates such as concrete, brick walls, etc. The following is an introduction to expansion screws:
1, Structural composition
Expansion screws are generally composed of screws, nuts, washers, and expansion tubes.
Screw: usually made of metal material with external threads, used to pass through the fixed object and cooperate with the nut.
Nut: Match the thread of the screw and fix the expansion screw on the substrate by tightening the nut.
Gasket: It plays a role in increasing the contact area, dispersing pressure, and preventing nut loosening.
Expansion tube: Generally a tubular structure, made of plastic or metal. During the installation process, the expansion tube will expand under the action of the screw, thereby firmly fixing it inside the substrate.
2, Working principle
The working principle of expansion screws is to use wedge-shaped slopes to promote expansion and generate frictional grip force, achieving a fixed effect. When inserting the expansion screw into the pre drilled hole and tightening the nut, the screw will pull the expansion tube outward. Under the action of tension, the expansion tube will expand and deform inside the hole, tightly bond with the substrate, and generate huge frictional and fastening forces, firmly fixing the fixed object on the substrate.
3, Main types
Metal expansion screw: Made of metal material, it has high strength and durability. Suitable for fixed applications that can withstand large loads.
Plastic expansion screw: usually made of high-strength plastic, lightweight, and easy to install. Suitable for situations where weight is required or the substrate is relatively soft.
4, Application Fields
Expansion screws are widely used in construction, decoration, electrical, mechanical and other fields.
In the field of architecture, it is used to fix doors, windows, railings, curtain walls, etc.
Decoration field: Can install chandeliers, cabinets, shelves, etc.
Electrical field: fixed distribution boxes, cable trays, etc.
Mechanical field: Used for fixing components of mechanical equipment, etc.
5, Installation precautions
Select appropriate specifications and models: Choose the appropriate expansion screw specifications and models based on factors such as the weight of the fixed object, the type and thickness of the substrate, etc.
The drilling size should be accurate: the diameter and depth of the drilling hole should match the specifications of the expansion screw to ensure that the expansion screw can be firmly fixed on the substrate.
Tighten the nut during installation: Ensure that the expansion screw is fully expanded and tightly attached to the substrate, but also avoid excessive tightening that may cause the expansion tube to rupture or damage the substrate.
Pay attention to the quality of the substrate: For loose or low strength substrates, special installation methods or the use of reinforced expansion screws may be necessary.
Q1: Why did you choose us?
To provide our customers with first-class high-quality fastener supply services and minimize costs to the greatest extent possible.
1.1. Vision: We hope to establish successful relationships with our partners and become their preferred supplier of fasteners.
1.2. Mission: Professional customer service, technological innovation.
In addition, we not only provide you with fasteners of better quality and price than you expect, but also hope to become your friend and provide you with market sales advice for your reference. If you have better ideas, please feel free to share them with us at any time.
Question 2. How to ensure quality?
All of our processes strictly adhere to the ISO9001:2008 procedure. We have strict quality control from production to delivery. The company has strong technical strength and has trained a group of management personnel who are familiar with product quality and good at modern management concepts.
Q3: What if you cannot find the product you need on our website?
You can send pictures/photos and drawings of the products you need via email, and we will check if they are available. We develop new models every month, or you can send us samples via DHL/TNT and we can specifically develop new models for you.
Q4: Can you strictly follow the tolerances on the drawing and meet high precision?
Yes, we can. We can provide high-precision parts and make them according to your drawings.
Q5: How should I place an order and make payment?
According to T/T, the sample is 100% according to the order; For production, a 30% deposit is paid via T/T before arranging production, and the balance is paid before shipment.
Q6: What is your delivery time?
Standard parts: 7-15 days
Non standard parts: 15-25 days
We will deliver as soon as possible while ensuring quality.
Q7: How to customize (OEM/ODM)
If you have new product drawings or samples, please send them to us and we can customize the hardware according to your requirements. We will also provide professional advice on products to make the design more realistic and maximize performance.
Q8: Which mode of transportation would be better?
Generally speaking, production is heavy, and we recommend shipping by sea. We also respect your opinions on other transportation options.
){kind=link}