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Get the right fastener for a variety of mounting and repair projects with this 80-piece expansion screw petal nut assortment. The kit includes four commonly used sizes, providing a convenient selection for DIY, construction, home improvement, and general fastening applications.
Included SizesM4 x 20mm
M4 x 25mm
M5 x 25mm
M6 x 25mm
With multiple sizes included, this metal petal nut assortment gives you plenty of replacements for different mounting requirements.
Heavy-Duty Carbon Steel ConstructionStrong, Durable & Corrosion ResistantThese expansion petal nuts are manufactured from high-quality carbon steel for strength and durability. The galvanized silver-colored surface helps provide resistance against rust and corrosion, making the fasteners suitable for a wide range of indoor and general-purpose applications.
The enlarged expansion head provides a broad gripping area behind thin or hollow materials, helping create a secure mounting point.
Easy Expansion InstallationSimple Jack Nut InstallationThese expansion screw petal nuts, also commonly known as jack nuts, are designed for convenient installation in compatible thin or hollow materials.
To install, insert the petal nut into the prepared hole, then tighten the screw while holding the nut securely with a suitable wrench or pliers. As the screw is tightened, the nut expands behind the material to create a firm anchor point.
Secure Fastening Without Over-TighteningThe expanding design allows the nut to grip the backside of the material as it is tightened. Use controlled pressure during installation and avoid excessive tightening, which may damage the threads or material.
Wide Range of ApplicationsIdeal for Thin, Hollow & Sheet MaterialsThese metal expansion nuts are suitable for many DIY, repair, and construction projects involving compatible thin or hollow materials.
Common applications include:
π§ Hollow wall mounting
π License plate installation
π Billboard mounting
ποΈ Sheet metal projects
πͺ΅ Composite wood
π§± Thin panels
π οΈ Plastic materials
π Home improvement
π© General DIY construction
The expanding petal design helps provide a secure fastening point where a standard nut may be difficult or impossible to install.
Larger Expansion Head for Reliable SupportStrong Grip Behind Thin MaterialsThe expanded petal head spreads behind the mounting material as the screw is tightened. This creates a larger contact area and helps distribute the fastening force across the material.
This makes the jack nut assortment kit especially useful for compatible thin panels, hollow walls, sheet metal, and other applications where backside access is limited.
Product SpecificationsExpansion Petal Nut DetailsProduct Type: Expansion Screw Petal Nuts / Jack Nuts
Quantity: 80 Pieces
Material: Carbon Steel
Surface Finish: Galvanized
Color: Silver
Sizes Included: M4-20, M4-25, M5-25, M6-25
Application: Thin Materials, Hollow Walls, Sheet Metal & DIY Projects
80 x Expansion Screw Petal Nuts
Assorted M4, M5 & M6 Sizes
Whether you're mounting a license plate, securing a sign, working with sheet metal, or installing hardware on a compatible hollow wall, this 80-piece expansion petal nut assortment provides a convenient fastening solution.
With durable carbon steel construction, galvanized corrosion-resistant surfaces, four useful sizes, and an expanding jack-nut design, this kit is a practical addition to your toolbox or hardware collection.
Important Installation NoteAlways select the correct size for your material thickness and application. Check the hole diameter, screw compatibility, and material condition before installation. Do not over-tighten the fasteners.

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