🔩 Expansion Screw Petal Nuts – Strong & Secure Fastening
🔩 Expansion Screw Petal Nuts – Strong & Secure Fastening
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🔩 Expansion Screw Petal Nuts – Strong & Secure Fastening
Small Screw.
A More Secure Hold.
A loose connection can make a great DIY project feel unfinished. These zinc-plated petal expansion anchors open behind suitable thin panels as you tighten—creating a wider gripping surface where an ordinary screw alone may struggle.
A Screw Can Only Do So Much. Give It a Better Anchor.
On suitable thin or hollow-backed panels, the material around a hole may not give a regular screw enough purchase. A petal expansion anchor is designed to open on the other side, adding a larger contact area for a more confident fastening.
Tighten the Screw. See the Petals Open.
As the screw is tightened, the metal sleeve compresses and its slotted sections fold outward. That expansion creates the signature petal-shaped anchor behind the mounting surface.
Drill. Insert. Tighten.
The mechanism is straightforward, making these anchors useful for prepared DIY repairs and panel-fastening jobs. Use the drill-hole size matched to your selected version.
Carbon Steel Strength. Clean Zinc-Plated Finish.
Made from carbon steel with a silver zinc-plated surface, these metal expansion nuts combine a solid fastener construction with a protective finish designed to help resist everyday surface corrosion.
For the Fixes and Projects Around Your Space.
Use petal expansion fasteners for suitable thin-panel connections in furniture, brackets, fixtures, and DIY assemblies. The anchor works by gripping behind the panel—not by simply cutting threads into the surface.
Familiar Tools. A Smarter Fastening Method.
The pictured cross-head design works with an appropriately fitting screwdriver bit, while compatible powered tools can help speed up repetitive assembly. A neat way to add the expanding-anchor principle to your toolbox.
Four Useful Sizes. One Smart Expansion Design.
Choose the thread size and length that matches your project. The seller supplies four options, with a different recommended hole diameter for M4, M5 and M6. Each size comes in a pack of 20.
Compact M4 choice for suitable thin-panel installation.
Longer M4 thread option with the same nominal drill-hole diameter.
Mid-size M5 thread and larger expansion sleeve.
Larger M6 thread option with a wider expansion sleeve.
The seller's four diagrams list a reference panel thickness of 0–5 mm. Select the matching product option above before checkout; size cards here are informational only.
20 Pieces. Ready for More Than One Fix.
One project rarely ends with a single screw. Keep a useful supply of matching expansion fasteners on hand for planned installations, replacements and future DIY jobs.
The Right Details Make a Better Connection.
Expanding Metal Petals
Open behind suitable panels to create a wider gripping area.
Zinc-Plated Carbon Steel
Durable metal construction with a protective silver finish.
Four Size Choices
Select M4, M5 or M6 sizes in practical 20-piece packs.
Choose with Confidence.
- Product Type
- Petal Expansion Screw Anchor / Expanding Metal Nut
- Expansion Method
- Slotted metal sleeve expands into petals as the screw is tightened
- Material
- Carbon steel with zinc-plated finish, as listed by the seller
- Size Options
- M4 × 20 mm; M4 × 25 mm; M5 × 25 mm; M6 × 25 mm
- Recommended Drill Hole
- M4: 8 mm; M5: 10 mm; M6: 12 mm, per original size diagrams
- Reference Panel Thickness
- 0–5 mm shown in seller's specification images
- Sleeve Length
- M4 × 20: 16 mm; other listed 25 mm variants: 20 mm
- Finish Color
- Silver / zinc-plated metal
- Package Quantity
- 20 pieces per selected size pack
- Application Style
- Suitable predrilled thin panels and accessible rear-cavity fastening arrangements
Helpful Answers for Your Next Project.
How do petal expansion nuts work?
When you tighten the screw, the slotted metal sleeve compresses and spreads outward behind the panel into a petal-like shape. This helps create a wider bearing surface for the connection.
Which size options can I order?
The store lists four variants: M4 × 20 mm, M4 × 25 mm, M5 × 25 mm and M6 × 25 mm. Each selected size is offered in a 20-piece pack.
What size drill bit should I use?
According to the seller's size graphics, use an 8 mm bit for the M4 options, 10 mm for M5 × 25 mm, and 12 mm for M6 × 25 mm.
Can I install them with a screwdriver?
The pictured fastener uses a cross-head screw that can be tightened with a properly fitting driver bit. Compatible powered tools may also be used for repetitive work.
Are these for solid concrete or brick?
The product works by opening behind a panel, so it is intended for fastening arrangements with suitable panel thickness and sufficient space for the sleeve to expand. A solid masonry anchor is a different fastening design.
Are the nuts stainless steel?
No. The seller lists carbon steel with a zinc-plated finish, which is not the same material as stainless steel.
What is included in one pack?
One selected size pack contains 20 petal expansion fasteners, as shown in the size options. Tools and objects displayed in application photos are not part of the pack.
Can I use them for load-bearing structural work?
The seller has not published a verified load rating for these anchors. For safety-critical or structural installations, use fastening systems with appropriate tested load ratings and engineering guidance.
Give the Next Fix a Firmer Finish.
A clever expanding design, zinc-plated steel construction and practical size options—ready for the little projects that deserve a better hold.
Choose Your 20-Piece Pack ↑Back to the available sizes, bundle choices and purchasing controls above.
