4-Prong T-Nuts for Wood | Heavy-Duty Zinc Plated Steel Captive Inserts for Furniture, Cabinetry & DIY Projects

Secure, Professional Joints in Wood, Made Simple.

Create strong, permanent, and reusable machine threads in wood, particleboard, and composite materials with our Heavy-Duty 4-Prong T-Nuts. These versatile fasteners are the professional's choice for projects that require robust connections and the ability to assemble and disassemble components without damaging the wood. Perfect for furniture makers, cabinet builders, and DIY enthusiasts, T-nuts provide a secure, internal anchor point for bolts and other threaded hardware.

Unpacking the Design: The Four-Pronged Advantage

Our T-Nuts are engineered for superior performance and ease of use. Every feature is designed to ensure a successful, lasting result in your project.

• Rock-Solid, Anti-Rotation Grip: The four sharp prongs are designed to bite deep into the wood upon installation. This robust configuration locks the nut securely in place, preventing the frustrating spinning and loosening that can occur with other types of fasteners during bolt tightening.

• Perfectly Flush, Professional Finish: When correctly installed, the flanged head of the T-nut sits perfectly flush with the wood's surface. This creates a clean, snag-free finish that is essential for high-quality furniture, cabinetry, and other projects where appearance matters.

• Built to Last with Zinc-Plated Steel: Crafted from high-quality steel, these T-nuts are coated with a protective layer of zinc. This galvanization process provides excellent resistance to rust and corrosion, ensuring long-term durability and making them suitable for both indoor and outdoor applications.

• Versatile Metric Threads: Featuring standard metric threads in M4, M5, M6, and M8 sizes, our T-nuts are compatible with a wide range of commonly available bolts, machine screws, and hardware, ensuring seamless integration into your projects.

A Universe of Applications: Inspire Your Next Project

While essential for furniture, the versatility of 4-prong T-nuts extends to a vast range of professional and hobbyist projects.

• Furniture Making & Repair: The cornerstone application. Ideal for securely attaching legs to tables and chairs, assembling bed frames, mounting hardware on cabinets, and constructing knock-down furniture that can be easily transported.

• Cabinetry & Shop Jigs: The perfect solution for creating strong, adjustable joints in custom kitchen cabinets, workshop shelving units, and reusable workshop jigs that need to be reconfigured or adapted over time.

• Heavy-Duty Construction: The "Heavy-Duty" claim is validated by their use in high-load and safety-critical applications like home climbing walls, playground equipment, and gym apparatus where connection integrity is paramount.

• DIY Audio & Speaker Building: A favorite among audiophiles and hobbyists for securely mounting speaker drivers to MDF or plywood baffles. T-nuts provide a reliable connection that won't strip or vibrate loose over time.

• Upholstery Projects: An indispensable component for professional upholsterers and furniture restorers, used to create hidden anchor points inside frames for attaching feet, legs, and other hardware.

The Expert Installation Guide: Get it Right the First Time

Proper installation is the key to unlocking the full strength of a T-nut. Follow these steps for a perfect, secure fit every time.

1. Preparation is Key: Select a T-nut that matches the thread size of your bolt. Ensure the T-nut's barrel length is appropriate for the thickness of your wood, so it doesn't protrude from the other side.

2. Drill the Pilot Hole: Using an appropriately sized drill bit, drill a hole through your material at the desired location. The hole's diameter should be the same as or slightly larger than the T-nut's barrel to ensure a snug fit. A hole that is too large will result in a loose fit, while a hole that is too small may cause the wood to split. Refer to our specification table below for recommended drill bit sizes.

3. Choose Your Installation Method:

• Method A: The Hammer-In (Quick & Easy): Ideal for softwoods and rapid assembly. Insert the T-nut's barrel into the pre-drilled hole. Using a hammer or rubber mallet, gently tap the flange until the four prongs are fully embedded and the flange sits flush with the wood surface. Pro-Tip: Avoid excessive force, as heavy hammering can damage the nut, bend the prongs, or split the wood, especially in particle board or MDF.

• Method B: The Bolt-Pull (Controlled & Precise): Highly recommended for hardwoods or delicate projects to prevent splitting. Insert the T-nut into its hole. From the opposite side of the material, thread a matching bolt (with a washer under the head) into the T-nut. As you tighten the bolt with a wrench, it will slowly and evenly pull the T-nut's prongs into the wood, seating the flange perfectly flush for maximum strength and a clean finish.

4. Final Assembly: Once the T-nut is securely seated, remove the installation bolt (if used) and attach your final component.