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Your Professional Expansion Screws Manufacturer

 

Wuxi Lemar Metal Products Co., Ltd. is a professional fastener system service group integrating scientific research, manufacturing, sales and logistics. It follows the business philosophy of "striving for excellence and adhering to integrity" and has established a good image in the field of fastener manufacturing and sales. It has established long-term cooperative relationships with major well-known logistics brands at home and abroad to ensure that products are delivered to customers at the fastest speed and are well received by users.

 

 
 
Why Choose Us
 

Technical team support
Possess full process manufacturing capabilities and experimental research and development capabilities for fasteners. With strong technical strength and 3D marketing network, it has more than 100,000 enterprise-level users and serves 57 industries.

 

Production Equipment
Our company has cold heading machines, thread rolling machines, wire drawing machines, thread rolling machines, tapping machines, vibration plate automatic assembly and other processing and feeding equipment.

 

Sales Market
Lemar Assisting scientific research enterprises,exported to Europe,North America, Africa, Central Asia, Middle East.

 

Expansion Screws - Overview

 

 

Expansion screws, also known as expansion anchors or wedge anchors, are fasteners used to secure objects to solid materials like concrete or masonry. They work by expanding within a pre-drilled hole, creating a tight grip and preventing the screw from pulling out. This expansion is typically achieved by tightening a bolt, which forces a sleeve or wedge to expand outwards against the surrounding material.

 

Product Specification
 

We provide the following product specifications：

Type

Traditional Linear

Length

12 mm

Width

6.2 mm

Depth

3 mm

Arch

Lower

Contains Friction

No

Movement per Rotation

0.7mm

Acrylic Born

Acrylic Applications

Activation Points

1 Point

Expansion Amount

5.5mm

Used For

Transverse

Non-Backup Feature

No

Non-Separating Feature

No

Spring Loaded

No

 

Types of Expansion Screws
productcate-730-500
 

Wedge Anchors

Wedge anchors consist of a threaded rod, a nut, a washer, and an expansion clip.
The rod is inserted into a pre-drilled hole, and as the nut is tightened, the clip at the bottom expands outward, wedging against the sides of the hole.
Advantages: High holding power and resistance to pull-out and shear forces.
Suitable for dynamic loads and vibratory conditions.

productcate-730-500
 

Sleeve Anchors

Comprise a threaded bolt surrounded by an expanding sleeve.
When the bolt is tightened, the sleeve expands outward, anchoring itself into the hole.
Advantages: Versatility in various base materials.
Can be used with different head styles (hex, round, flat, etc.) for various aesthetic and functional requirements.

productcate-730-500
 

Drop-In Anchors

Drop-in anchors are cylindrical and feature an internal thread.
A setting tool is used to expand the bottom of the anchor after it's placed in a pre-drilled hole.
Advantages: Flush with the surface after installation, allowing for a smooth finish.
Excellent for overhead and vertical applications.

productcate-730-500
 

Plastic Expansion Anchors

Made of plastic and expand when a screw is driven into them, creating a tight grip.
Available in various shapes and sizes to match screw diameter and wall thickness.
Advantages: Inexpensive and easy to install.
Widely available in different sizes and shapes for various uses.

productcate-730-500
 

Machine Screw Anchors

Consist of a machine-threaded screw and an internally threaded expansion shield.
When the screw is tightened, the shield expands and anchors itself.
Advantages: Strong and secure anchoring for heavy loads.
Can be used with machine screws for precise fastening.

 

 

 
 
Application of Expansion Screws
01.

Construction Industry

Used to secure heavy objects such as beams, brackets, and railings, ensuring structural safety.

02.

Home Renovation

Widely used for installing wall-mounted shelves, bathroom fixtures, lighting, and more.

03.

Mechanical Equipment

Provides sturdy support in the foundational fixing and component connections of machinery.

04.

Outdoor Facilities

Ideal for installing items like flower beds, fences, and billboards that need to withstand outdoor elements.

 

Customization Process

 

Requirement Discussion

Contact us and provide your design drawings, size specifications, and other technical parameters.

01

Design Proposal

Our professional team will develop a design proposal and provide a quotation based on your requirements.

02

Sample Production

We produce samples according to the design proposal and conduct rigorous testing.

03

Mass Production

Upon your approval, we commence mass production to ensure timely delivery and consistent quality.

04

After-Sales Service

We offer ongoing technical support and service to ensure the long-term stable operation of our products.

05

 

 

Other Services
  • Surface treatment: Plain, Galvanized, Hot Dip Galvanized, Black Oxide, Anodized, etc.
  • Excellent quality control system for fine dimensional accuracy.
  • Various materials are available as per your request
  • Conform to international standard.
  • We had got certificate of ISO9001: 2008, SGS & RoHS.
  • Prompt delivery.
  • Various sizes are available.
  • Material: Stainless Steel 18-8 18-10, Carbon steel Gr4.8 Gr8.8 Gr10.9, Gr12.9, Aluminum, Copper, etc.
  • Packing Stylet: General export packing
  • Can be made with different standards such as ISO, DIN, AS/NZS, GB, ANSI, BS and special standard.
  • Good customer service
  • OEM is available
Plastic Wall Screws

 

Package & Delivery

 

Package: Standard export package
Delivery: By air express, by sea

 

productcate-1-1

 

FAQ

 

Q: Why use expansion screws?

A: Expansion bolts are vital fasteners used to secure objects in concrete and masonry. They consist of key components that work together to provide a strong hold, making them suitable for various applications.

Q: Can expansion screws be used in drywall?

A: Use: Suitable for light to medium loads in drywall, plaster, and hollow walls. Features: Plastic anchors expand as the screw is tightened, providing grip against the wall. Installation: Drill the Hole: Use a drill bit that matches the size of the anchor.

Q: How much can expansion screws hold?

A: Molly bolts can hold up to 75 pounds per pair on drywall, plaster and other hollow walls. Expansion anchors can hold up to 100 pounds per pair on concrete, brick and masonry walls. Self-drilling anchors can hold up to 150 pounds per pair on drywall, plaster and other hollow walls.

Q: Which is better, a wedge anchor or a sleeve anchor?

A: Sleeve anchors are a versatile and easy-to-install solution for hollow masonry or light to medium applications. However, if you are working with solid concrete and require maximum holding strength, wedge anchors are the clear choice.

Q: What's the difference between a screw and a bolt?

A: While both are threaded fasteners, screws are usually used without a nut and rely on their internal threads, while bolts are used with nuts and sometimes washers for secure assembly.

Q: Can I reuse screws?

A: Yes, screws can typically be reused, especially if they are undamaged. However, checking for wear or stripping is advisable to ensure their effectiveness upon subsequent uses.

Q: How can I prevent screws from rusting?

A:Use screws made from materials with high corrosion resistance, such as stainless steel, or apply a protective coating like zinc plating to extend their lifespan in harsh environments.

Q: Are you manufacturer or trading company?

A: We are manufacturer.

Q: What's your best delivery time?

A: Within 15-30 days.

Q: What is the quality control of your product?

A: Follow strictly quality control measures for implementation.

Q: Will your company provide free sample?

A: It depends on which sort of item you want to get. Some can be provided free of charge, however, the client shall assume the shipping fees himself.

Q: Is OEM open to clients?

A: Yes, we can provide both OEM and ODM service.

Q: How can our company be your distribution partner?

A:  We welcome you to be our distributor. For further details, please contact us.

Q: What is the payment of sample?

A: T/T and Alipay both acceptable.

Q: What is your sample policy?

A: If we have stock, we can provide samples, but the customer must pay the sample fee and express fee Question.

Q: Have you tested all your goods before shipment?

A: Yes, we will conduct 100% test before delivery, and we will send detailed photos of parts for your approval Question.

We're well-known as one of the leading expansion screws manufacturers and suppliers in China. If you're going to wholesale high quality expansion screws made in China, welcome to get pricelist and free sample from our factory. Also, OEM service is available.

Plastic Wall Screws, Shaped Steel Wall Anchor, expansion screws

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