Crack-Resistant Nylon Knot Expansion Plastic Wall Anchor Four-Wing Plug for Light Fixture Gypsum Board
Product Description
The M5 x 50mm Nylon Four-Wing Knot Expansion Wall Plug is a crack-resistant plastic fastening solution engineered for light fixtures, ceiling lamps, and wall sconces on gypsum board and drywall surfaces. The anchor features a reinforced four-wing knot-expansion body made from high-toughness PA6 nylon that resists cracking during installation and long-term use. The nylon material naturally dampens minor vibrations from ceiling fans and foot traffic, preventing gradual anchor loosening. When the M5 screw is driven in, the four wings progressively fold outward behind the gypsum board, creating a dependable knot-lock. Installation requires drilling an 8mm hole, inserting the anchor flush with the ceiling or wall surface, and driving the screw to deploy the full wing expansion.
Features
Four-Wing Knot Expansion Lock - The four wings deploy in a progressive knot pattern behind the gypsum board as the screw advances, creating multiple locking points that distribute ceiling fixture weight safely and evenly.
Crack-Resistant Wing Body - High-toughness PA6 nylon formulation prevents wing cracking or snapping during the expansion process, even when driven into slightly undersized or irregular drill holes in gypsum board.
Vibration-Dampening Core - The nylon anchor body naturally absorbs minor ceiling vibrations from fans, foot traffic, and door operation, maintaining tight screw engagement and preventing gradual fixture loosening over time.
Extended 50mm Reach - The longer body length ensures the wings deploy well behind the gypsum board face, engaging solid cavity space for reliable load support of pendant lights and wall sconces.
Technical Parameters
| Product Name |
Nylon Four-Wing Knot Expansion Wall Plug UW Series |
| Model Number |
UW-M550 |
| Screw Diameter |
M5 |
| Anchor Length |
50mm |
| 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 |
53mm |
| Wing Expansion Range |
8-20mm |
| Pre-drill Required |
Yes - drill hole to recommended diameter |
| Recommended Drill Type |
Masonry drill bit for hollow substrates |
| Load Capacity (Plasterboard) |
Up to 28kg per anchor |
| Load Capacity (Hollow Brick) |
Up to 35kg per anchor |
| Pull-Out Resistance |
Varies by substrate density and wing expansion depth |
| Shear Strength |
Up to 42kg 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 |
Light Fixtures and Ceiling Lamps on Gypsum Board |
| 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.