Knot-Style Nylon Cavity Wall Plug Four-Wing Expansion Anchor for Curtain Rod Hollow Brick Mounting
Product Description
The M5 x 35mm Nylon Four-Wing Knot Expansion Wall Plug is a medium-duty plastic fastening solution designed for curtain rod brackets, window hardware, and blind fixtures on hollow brick and cavity wall surfaces. The anchor features a four-wing knot-expansion mechanism made from durable PA6 nylon. When the M5 screw is driven into the anchor body, the wings fold outward inside the hollow brick cavity, creating a knot-style mechanical lock that grips the inner wall surface firmly. Installation is simple: drill an 8mm hole into the hollow brick, insert the anchor flush, position your curtain rod bracket, and drive the M5 screw through the bracket into the anchor until the wings deploy and resistance confirms a solid lock.
Features
Rust-Proof Nylon Construction - Manufactured from 100% rust-proof PA6 nylon, this anchor maintains its structural integrity indefinitely in window areas where condensation and humidity are common environmental factors.
Knot-Style Cavity Lock - The distinctive knot-expansion design causes the four wings to fold outward and interlock behind the hollow brick face, creating a secure anchor point that resists the repeated tension of curtain operation.
Easy Pre-Drill Installation - Clean 8mm pre-drilled hole preparation ensures precise anchor placement with minimal substrate damage, while the ribbed body prevents spinning during screw driving for reliable wing deployment.
Wide Wing Bearing Area - The four-wing design expands to an 18mm diameter behind the wall, distributing pull-out forces across a generous bearing area for stable long-term curtain rod support.
Technical Parameters
| Product Name |
Nylon Four-Wing Knot Expansion Wall Plug UW Series |
| Model Number |
UW-M535 |
| Screw Diameter |
M5 |
| Anchor Length |
35mm |
| Wing Count |
4 Wings |
| Material |
Nylon PA6 / Polyamide Engineering Plastic |
| Color Options |
White, Grey, Blue, Natural (customizable) |
| Anchor Structure |
Four-wing folding body with knot-expansion mechanism |
| Drill Hole Diameter |
8mm |
| Min Embedment Depth |
38mm |
| Wing Expansion Range |
8-18mm |
| Pre-drill Required |
Yes - drill hole to recommended diameter |
| Recommended Drill Type |
Masonry drill bit for hollow substrates |
| Load Capacity (Plasterboard) |
Up to 22kg per anchor |
| Load Capacity (Hollow Brick) |
Up to 30kg per anchor |
| Pull-Out Resistance |
Varies by substrate density and wing expansion depth |
| Shear Strength |
Up to 35kg in 12.5mm plasterboard |
| Installation Method |
Pre-drill hole → insert anchor flush → drive screw to expand wings |
| Installation Tool |
Drill + Screwdriver / Impact driver with Phillips bit |
| Key Mechanism |
Screw drives into anchor body forcing four wings to fold outward creating knot-lock |
| Anti-Rotation Feature |
Ribbed body prevents spinning during screw insertion |
| Suitable Substrates |
Plasterboard, Drywall, Gypsum Board, Hollow Brick, Cavity Wall, Aerated Concrete, Lightweight Concrete |
| Common Uses |
Curtain Rod Brackets and Window Hardware on Hollow Brick |
| Temperature Range |
-40°C to +80°C |
| Environmental Suitability |
Indoor and outdoor use (UV-stabilized PA6) |
| Corrosion Resistance |
100% rust-proof plastic construction |
| Compliance |
RoHS Compliant, REACH Compliant |
| Standard Packaging |
100 / 200 / 500 / 1000 pieces per box or poly bag |
| Screws Included |
Anchors sold separately, matching screw kits available |
| Certifications |
ISO 9001:2015 |




FAQ
Do you have full standard sizes in stock for plastic expansion anchors?
We have complete conventional sizes in stock, full specifications ready for immediate shipment, support mixed size bulk wholesale.
What is the material and load-bearing capacity of your plastic wall plugs?
Made of high-quality new engineering plastic, high toughness anti-crack; stable holding force for drywall, hollow wall and plasterboard, suitable for light and medium load installation.
What types of walls and base materials can this plastic wall plug be used for?
It is widely applicable to gypsum board, plasterboard, hollow brick, aerated concrete, light concrete and cavity wall, no need pre-drilling for soft substrates.
What is your MOQ and wholesale price discount policy?
Low MOQ supports small batch trial order; the more quantity you order, the more favorable wholesale price, exclusive discount for long-term distributors.
What is your production lead time and mass supply capacity?
Spot goods can be shipped within 3-7 days; large batch orders 7-15 days, stable daily output to support continuous large-volume supply for distributors.
Can you customize size, color, packaging and OEM private label?
We support custom size, color, box packaging, carton marking and OEM/ODM private label service for your local market sales.
Do you support mixed batch with other fastener products?
Yes, you can mix order with our other fasteners like screws, bolts and wall plugs to fill one container conveniently.
Can I get free samples for quality checking?
Free samples are available, customers only need to bear the freight; sample size and quantity can be arranged according to your requirement.