🔩 A2 Stainless Steel Dual Thread Hanger Bolts – Wood to Metal Dowels for Furniture
Ever tried attaching a wooden tabletop to metal legs or mounting a wooden rail to a steel bracket? Regular screws just don't cut it. These dual-thread hanger bolts solve that problem: one end has aggressive wood screw threads, the other end has standard machine threads. You screw the wood end into your timber, then use a nut or threaded metal part on the machine side. Made from A2 304 stainless steel, they won't rust even in humid workshops or outdoor furniture. Available in sizes from M4 to M12, so you can match your project exactly.
✨ Why These Wood to Metal Dowels Make the Job Easier
True dual-thread design – Coarse wood thread (lag-style) on one end, ISO metric machine thread on the other. No more welding or drilling odd adapters.
A2 304 stainless steel – Great corrosion resistance. Use them for outdoor furniture, bathroom vanities, or any place that might see moisture.
Round head center stop (no head actually) – These are headless bolts with a smooth middle section. The unthreaded center acts as a depth stop when driving into wood.
Multiple size options M4 to M12 – M4 and M5 for small furniture feet, M6 and M8 for standard table legs, M10 and M12 for heavy beams or workbenches. Pick the thread size that fits your metal nut or insert.
Grade A2-70 strength – Good tensile strength for load-bearing furniture. Reliable for chairs, benches, and shelving units.
📐 Technical Specifications
| Product Type |
Wood to Metal Hanger Bolt / Dowel Screw – Dual Thread |
| Material |
A2 (304) Stainless Steel |
| Grade |
A2-70 |
| Head Style |
Headless (round center body, no hex or slot) |
| Wood Thread End |
Coarse wood screw thread (lag style, sharp point) |
| Machine Thread End |
Metric coarse thread (M4 / M5 / M6 / M8 / M10 / M12) |
| Available Sizes (Diameter) |
M4, M5, M6, M8, M10, M12 |
| Length |
Total length varies by size – please check variant options |
| Finish |
Raw stainless steel / no coating |
| System of Measurement |
Metric |
❓ Frequently Asked Questions
How do I install these dual-thread hanger bolts into wood?
The easiest method: thread two nuts onto the machine-thread end, lock them together (jam nut style), then use a wrench on the inner nut to drive the wood end into your pre-drilled pilot hole. Once fully seated, remove the jam nuts. Alternatively, use a hanger bolt driver bit (available separately) that grips the smooth center. Always pre-drill a hole about 1mm smaller than the wood thread diameter to prevent splitting, especially near edges.
Can I use these for outdoor furniture?
Yes. The A2 304 stainless steel resists rust from rain, humidity, and morning dew. They're perfect for patio tables, garden benches, and outdoor plant stands. For direct saltwater exposure (beachfront), consider 316 marine grade, but for most backyards these will hold up beautifully for years.
What's the difference between a hanger bolt and a regular screw?
A regular screw has a head (flat, pan, hex) and is driven entirely into one material. A hanger bolt has no head; one end screws into wood, the other end sticks out with machine threads. That exposed threaded end accepts a nut, a metal bracket, or screws into a threaded insert. This lets you attach metal parts to wood without exposed screw heads.
Which size should I choose for furniture legs?
For lightweight chair or table legs (like IKEA-style furniture), M6 or M8 is common. For heavy dining tables or workbenches, M10 is safer. The wood thread diameter should match your pilot hole – measure the metal leg's threaded insert or nut first. If you're not sure, M8 is a good middle choice for most standard furniture applications. Feel free to message us for advice on your specific project.
Do I need to pre-drill both wood and metal?
Pre‑drill only the wood side. The wood thread is self-tapping into timber. The machine thread side is meant to go into a nut or a pre‑tapped metal hole — do not try to screw the machine thread directly into untreated metal without a nut, as it will jam or strip. If you're going into soft metal like aluminum, you can tap a hole first.
⚠️ Note: Sizes shown are nominal. Please allow slight manufacturing tolerances (±0.3mm). If you need a specific length or custom thread combination, contact us before ordering.
