10-Piece Metal Expansion Petal Screws | Home & Auto Bolts

10-Piece Metal Expansion Petal Bolts & Screws — Home, Automotive & Commercial Use

Meet the fastener that does the heavy lifting. This 10-piece set of metal expansion screws (jack nuts) features a unique four-petal expansion structure that grips walls, panels, and surfaces with remarkable holding power. Whether you're mounting fixtures in your home, securing trim in a sedan or SUV, or installing components in an RV or commercial vehicle, these expansion bolts deliver consistent, vibration-resistant performance every time.

Why Choose These Expansion Petal Bolts?

• Enhanced Grip via Petal Design: The distinctive petal-shaped expansion structure maximizes friction against wall and panel surfaces, dramatically reducing the risk of loosening over time — even in high-vibration environments.
• High-Quality Metal Construction: Built with a balanced hardness-to-toughness ratio, these jack nuts resist deformation under significant stress, making them ideal for demanding household and automotive applications.
• Quick & Easy Assembly: Pre-matched screw system means no excessive torque required — installations are faster and simpler whether you're doing car maintenance or a home DIY project.
• Versatile Wall & Panel Compatibility: Adjustable expansion range fits standard drywall, automotive panels, and more — perfect for supporting lighting fixtures, trim, and other components in diverse settings.
• Long-Term Stability: Four-petal even load distribution provides vibration resistance ideal for HVAC units, power tools, and vehicle interiors.

Specifications

Perfect For

• Home drywall installations (lighting, shelves, fixtures)
• Automotive interiors — sedans, SUVs, RVs, commercial vehicles
• HVAC and power tool mounting
• General woodworking and DIY projects

Package Contents

• 10 × Metal Expansion Petal Screws

Note: Due to different monitor settings, actual color may vary slightly from images. Please allow ±1–2 cm measurement tolerance due to manual measuring.

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Safety & Standards Reference

For guidelines on safe use of fasteners and hardware in home and automotive applications, refer to the U.S. Consumer Product Safety Commission (CPSC) for product safety standards and best practices.

Learn more: Banjo-Kazooie: Nuts & Bolts

Frequently Asked Questions

Q: What are expansion petal bolts (jack nuts) used for?

A: Expansion petal bolts, also called jack nuts, are fasteners designed to provide a secure anchor point in thin or hollow materials such as drywall, sheet metal, and automotive panels. Their four-petal expanding design grips the back of the surface when tightened, making them ideal for home fixtures, car interior trim, RV installations, and commercial applications.

Q: What sizes are included in this 10-piece expansion screw set?

A: This set is available in M425 (approx. 0.8 × 0.8 × 2.5 cm) and M525 (approx. 1.0 × 1.0 × 2.5 cm) sizes. Each size is designed to accommodate different panel thicknesses and load requirements for home and automotive use.

Q: Are these expansion screws suitable for automotive use in sedans and SUVs?

A: Yes! These metal expansion petal screws are specifically designed for versatile use including sedans, SUVs, RVs, and commercial vehicles. Their vibration-resistant, four-petal structure ensures a reliable, long-lasting connection even in high-vibration automotive environments.

Q: Do I need special tools to install these expansion bolts?

A: No special tools are required. The pre-matched screw system is designed for quick, easy installation without excessive torque. A standard screwdriver is typically all you need, making these expansion bolts beginner-friendly for DIY home and automotive projects.