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Description
Threaded Wood Inserts Kit — Reliable Metal Threads in Any Wood Surface
Stripped screw holes and weak wood joints are a constant frustration for furniture builders and DIYers. This 162-piece threaded insert kit gives woodworkers, cabinet makers, and home improvement enthusiasts a permanent solution — installing durable metal threads directly into wood for bolt connections that hold firm over years of use.
The kit includes carbon steel inserts with a smooth, burr-free yellow zinc plating finish, available in 8 size combinations across 4 popular thread diameters (1/4-20 and 5/16-18), with lengths ranging from 10mm to 25mm. A 3mm hex wrench is included for immediate installation without additional tools.
Typical applications include flat-pack furniture assembly, cabinet hinge reinforcement, workbench construction, and modular shelving systems — anywhere a removable, reusable bolt connection is needed in wood.
✅ Compatible with all wood types including softwood (pine, cedar), hardwood (oak, maple, walnut), plywood, MDF, and particle board.
Key Features
🛠️ Complete 162-Piece Assortment Kit — Covers the most commonly needed insert sizes in a single purchase, eliminating the need to source individual sizes separately.
⚙️ 4 Popular Thread Sizes with Multiple Length Options — Includes 1/4-20 and 5/16-18 threads in 10mm, 15mm, 20mm, and 25mm lengths to match varying wood thickness requirements.
🛡️ Zinc-Plated Carbon Steel Construction — Yellow zinc plating provides corrosion resistance while the carbon steel core delivers the tensile strength needed for load-bearing furniture joints.
🔧 Includes Free 3mm Hex Wrench — Ready to install straight out of the box; no additional tools required for standard installations.
✋ Non-Slip Flange Design — The flanged head seats flush against the wood surface and prevents the insert from spinning or pulling through under load.
📦 Organized Storage Kit — Inserts are sorted by size for fast identification on the job, reducing setup time during assembly or repair work.
What's in the Box
1/4-20 × 10mm inserts
1/4-20 × 15mm inserts
1/4-20 × 20mm inserts
1/4-20 × 25mm inserts
5/16-18 × 12mm inserts
5/16-18 × 15mm inserts
5/16-18 × 20mm inserts
5/16-18 × 25mm inserts
1× 3mm Hex Wrench (included free)
Who Is This For
🪑 Furniture Assembly & Repair
Restore stripped bolt holes in chairs, tables, and bed frames, or build new furniture with bolt connections that can be disassembled and reassembled without degrading the joint.
🗄️ Cabinet Making
Install inserts in cabinet carcasses and door frames for hinge bolts and hardware mounting points that stay secure through years of daily use.
🔨 Woodworking Projects
Add professional-grade threaded connections to workbenches, jigs, and shop fixtures where repeated bolt removal and reinstallation is required.
🏠 DIY Home Improvements
Reinforce shelving brackets, wall-mounted storage, and modular furniture systems with metal threads that outlast wood screws in high-load applications.
Technical Specifications
Total Pieces
162
Material
Carbon Steel
Surface Finish
Smooth Burr-Free Yellow Zinc Plating
Flange Design
Non-Slip Grip
Thread Standards
Imperial (1/4-20, 5/16-18) / Metric (M6, M8)
Available Lengths
10mm, 12mm, 15mm, 20mm, 25mm
Drive Style
Hex Drive (Allen Key)
Included Tool
3mm Hex Wrench × 1
Compatibility
All Wood Types (Softwood / Hardwood / Plywood / MDF)
Variants Available
Imperial Kit / Metric Kit
Frequently Asked Questions
What drill bit size should I use for these inserts?
The pilot hole diameter should typically match the outer diameter of the insert body (excluding the flange). For 1/4-20 inserts, a drill bit of approximately 11/32" (8.7mm) is generally recommended. For 5/16-18 inserts, use approximately 7/16" (11mm). Always test on scrap wood first to confirm fit.
Can these inserts be used in MDF or particle board?
Yes. These inserts are compatible with MDF and particle board. For best results in lower-density materials, apply a small amount of wood glue around the insert before installation to improve holding strength.
Are the inserts removable after installation?
Yes. Hex drive inserts can generally be removed by reversing the hex wrench. However, repeated removal may enlarge the pilot hole over time. For permanent installations, a small amount of thread-locking compound is recommended.
What bolt size is compatible with these inserts?
The 1/4-20 inserts accept standard 1/4"-20 UNC bolts. The 5/16-18 inserts accept 5/16"-18 UNC bolts. For the metric variants, M6 and M8 bolts are compatible respectively.
Do I need adhesive to install these inserts?
Adhesive is not required for standard hardwood or softwood installations. The flanged, knurled design provides sufficient grip in most wood types. For softer or lower-density materials like MDF, wood glue can improve retention.
What is the difference between the Imperial and Metric kit variants?
The Imperial kit includes inserts with 1/4-20 and 5/16-18 UNC thread standards, designed for use with standard US/imperial bolts. The Metric kit includes inserts with M6 and M8 thread standards for use with metric bolts. Both kits contain 162 pieces total.
Is the hex wrench included in both variants?
Yes. A 3mm hex wrench is included with both the Imperial and Metric kit variants at no additional cost.
Add the 162Pcs Threaded Wood Inserts Kit to your cart and build furniture connections that hold — with the right size always on hand.
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162Pcs Threaded Wood Inserts Kit ...$18.99$39.99
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We accept returns within 30 days. Please contact us promptly if any items are missing or if there are issues with the shipment; we will arrange for a replacement after verification.
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The copper was clean and straight, but the brass wire was all kinky and not in a straight spiral definitely would’ve been nicer to Not have the Brass bent up
Hi Joshua, thank you for your feedback. We're glad you liked the copper wire. Due to packaging constraints, some wires may arrive bent. We appreciate your understanding. Thanks for shopping with us!
Hospice had given us a wheelchair that the caster nut cap was missing. So I replaced it with the 28mm tube cap. It was of good quality, sturdy and fit perfect. shipping was fast too.
Perfect they are really made well and I used them for my car
Perfect they are really made well and I used them for my car. The only thing I had a great for us. It took three weeks to get here. So shipping was slow.
Hi Scott, thank you for your feedback. We're sorry for any inconvenience caused. Please get in touch with us directly, and we'll assist you. Thanks for shopping with HomeDIYer!
