91-Piece Petal Jack Nut Tool Kit – M4/M5/M6 Hollow Wall Metal Anchors with Installation Pliers for Drywall & DIY Repair
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91 Pieces • M4 / M5 / M6 • Hollow-Wall Fastening
When There's Nothing Solid Behind the Wall, Give the Screw Something to Hold Onto.
A screw can feel tight at first and still pull straight out when the wall behind it is hollow. Petal jack nuts solve a different problem: once installed, the metal body expands behind the panel to create a wider mechanical anchor instead of relying on the front surface alone.
A Screw Is Only as Secure as the Material Behind It
The Screw Isn't Always the Problem. Sometimes There's Nothing Behind It to Grip.
Hollow panels, thin sheet material and drywall-style surfaces don't behave like solid wood. A regular screw may bite initially, then loosen, spin or pull through because there isn't enough solid material around the threads.
Screw Keeps Spinning
Thin material may not provide enough thread engagement for a conventional screw.
Fastener Pulls Through
Concentrating force around one small hole can allow a weak mounting point to deform or loosen.
No Solid Stud Behind the Spot
The mounting location you need doesn't always line up with a solid backing point.
The Holding Power Happens Behind the Panel
Squeeze the Tool and the Metal Body Opens Into a Wider Backside Anchor.
The slotted metal body is designed to deform outward during installation. As the anchor is compressed, the sections flare behind the panel, creating a broader bearing area than the original drilled opening.
Insert Through the Hole
Place the correctly sized petal jack nut into the prepared opening.
Compress With the Pliers
The included installation tool draws the anchor body into its expanded shape.
Anchor Behind the Panel
The expanded sections create a wider contact area behind the mounting surface.
Enough Hardware for More Than One Repair
Three Useful Sizes. Thirty of Each. One Installation Tool.
Instead of buying one anchor size and hoping every project matches, the kit includes M4, M5 and M6 options, giving you three fastening sizes ready for different compatible jobs.
91 Total Pieces
90 anchor assemblies plus 1 installation plier.
30× M4 × 25 mm
Smaller-size petal jack nut assemblies.
30× M5 × 25 mm
Mid-size option for compatible installations.
30× M6 × 25 mm
Larger threaded option included in the assortment.
The Correct Anchor Isn't Much Help Without a Way to Set It
The Installation Pliers Are Already in the Box.
Petal jack nuts need to be compressed so the body expands behind the panel. The included hand plier gives you a dedicated installation tool rather than leaving you to improvise the setting process.
Dedicated Installation Tool
Designed to help compress compatible petal jack nuts during installation.
Hand-Operated
The plier-style design provides direct manual control during the setting process.
Complete Starter Kit
Anchors and the matching installation concept come together in one set.
Don't Ask One Tiny Hole to Carry All the Force
The Expanded Shape Spreads Contact Across More of the Backside Surface.
Once set, the anchor body opens behind the panel. That expanded geometry helps distribute fastening force over a larger area than a bare screw relying only on the front-side hole.
Petal-Style Expansion
Slotted metal sections flare outward behind the panel.
Wider Contact Area
Expansion creates more backside surface contact around the mounting point.
Threaded Center
The installed anchor provides a threaded fastening point for the compatible screw.
Metal Hardware for Repeated DIY Work
Carbon-Steel Construction Gives the Anchor a Rigid Expansion Body.
The fasteners are described as carbon-steel hardware with a zinc-plated finish, combining a rigid metal structure with a protective surface treatment suited to general fastening and maintenance use.
Carbon-Steel Body
Metal construction provides the structure needed for the anchor to deform into its expanded shape.
Zinc-Plated Finish
The plated surface helps protect the metal during normal hardware use.
DIY-Friendly Assortment
Keep several sizes available for repair, installation and maintenance projects.
For the Jobs Where the Surface Is Thin or Hollow
Useful Anywhere a Conventional Screw Doesn't Have Enough Material to Bite Into.
Petal jack nuts are suited to compatible hollow-wall and thin-panel applications where access behind the surface is limited and a backside-expanding anchor provides a more practical fastening method.
Hollow Walls
Designed for installations where the fastener needs support behind a hollow surface.
Thin Panels
Useful when the material thickness alone does not provide much thread engagement.
Home Maintenance
Keep the assortment ready for compatible household mounting and repair tasks.
DIY Projects
Three sizes give hobbyists more fastening options from one kit.
A Simple Four-Step Fastening Process
Insert It. Set It. Expand It. Fasten Into It.
Prepare the Hole
Use a correctly sized opening suitable for the selected M4, M5 or M6 anchor.
Insert the Anchor
Place the petal jack nut through the panel until the flange sits at the surface.
Set With the Pliers
Use the installation tool to compress the anchor and form the backside expansion.
Install the Fastener
Use the matching threaded fastener for the compatible mounting application.
Don't Buy an Entire New Kit Every Time the Screw Size Changes
M4, M5 and M6 Cover Three Common Small Fastening Sizes.
The assortment gives you three threaded options in the same 25 mm listed length, making it easier to keep multiple compatible sizes on hand for future projects.
M4 M4 × 25 mm
30 pieces included in the kit.
M5 M5 × 25 mm
30 pieces included in the kit.
M6 M6 × 25 mm
30 pieces included in the kit.
A Different Solution for a Different Type of Wall
Stop Treating Hollow Material Like It's a Solid Block of Wood.
Screw Directly Into Thin or Hollow Material
Limited material around the screw threads
Fastener may spin if the hole becomes enlarged
Pulling force stays concentrated near the opening
Difficult when no solid backing is available
Repeated tightening can damage a weak mounting hole
Petal Jack Nut Anchor
Metal body passes through the prepared opening
Anchor expands behind the panel
Wider backside contact area after setting
Creates a threaded mounting point
Installation plier is already included in the kit
Don't Buy Five Anchors for a House Full of Future Repairs
Ninety Anchors Mean the Kit Stays Useful After the First Project.
A small repair pack solves today's problem. A 90-anchor assortment gives you hardware left over for the next compatible project, the next room and the next mounting job that shows up later.
90 Anchor Assemblies
Enough quantity for multiple compatible fastening projects.
Three Sizes Ready
Keep M4, M5 and M6 available in one set.
Tool Stays With the Hardware
The dedicated plier remains ready for the next installation.
Frequently Asked Questions
Everything to Know Before You Squeeze the First Anchor.
How many pieces are included?
The kit contains 91 total pieces: 90 petal jack nut assemblies plus one installation plier.
Which sizes are included?
The assortment includes 30 M4 × 25 mm, 30 M5 × 25 mm and 30 M6 × 25 mm petal jack nut assemblies.
What does the petal-shaped design do?
During installation, the slotted metal body is compressed so sections expand behind the panel, creating a wider backside anchor.
Is an installation tool included?
Yes. The set includes one hand-operated installation plier for setting compatible anchors in the kit.
What materials can these anchors be used with?
They are intended for compatible hollow-wall and thin-panel applications. Suitability depends on material thickness, hole size, anchor size and the load being mounted.
Can I use the same hole size for M4, M5 and M6?
No. Different anchor sizes require an appropriately sized mounting hole. Match the hole to the selected anchor before installation.
Can these support any amount of weight?
No universal load capacity should be assumed. Holding performance depends on the wall or panel material, thickness, installation quality, anchor size and the type of load.
Are these suitable for safety-critical mounting?
Use the anchor only where its size, substrate and expected load are appropriate. For heavy, overhead or safety-critical installations, follow applicable hardware and structural mounting requirements.
Product Details
91-Piece Petal Jack Nut Installation Kit
Insert • Squeeze • Expand • Secure
Stop Asking a Thin Wall to Hold a Screw Like Solid Wood.
Choose the size. Insert the anchor. Squeeze the installation pliers. Let the metal body expand behind the panel. Then create the threaded fastening point the hollow surface didn't have before. Three sizes, ninety anchors, and the tool to set them all in one kit.