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Attaching wooden table tops to metal frames, mounting furniture legs to base plates, or connecting wooden rails to steel brackets all share the same challenge: you need a fastener that grips wood on one end and accepts a nut or threaded insert on the other. These A2 stainless steel hanger bolts solve it — one end has aggressive coarse wood screw threads, the other is a standard metric machine thread ready for a nut, insert, or bracket.
Made from A2 (304) stainless steel to grade A2-70, these headless dual-thread dowel screws resist rust and corrosion in humid workshops, outdoor furniture, and bathroom vanities. Available in M4, M5, M6, M8, M10, and M12 diameters with lengths ranging from 30mm to 150mm (approximately 1.2” to 5.9”), in packs of 1, 2, 5, 10, or 25 pieces depending on size.
From lightweight chair legs and floating shelves to heavy dining tables, workbenches, and outdoor garden furniture, these hanger bolts create a clean, headless connection between wood and metal that won’t loosen under load.
| Thread Size | Available Lengths | Pack Options |
|---|---|---|
| M4 | 30 mm | 5 / 25 pcs |
| M5 | 30 / 35 / 40 / 45 / 50 mm | 5 / 25 pcs |
| M6 | 30 / 35 / 40 / 45 / 50 mm | 5 / 25 pcs |
| M6 | 60 / 70 / 80 / 90 / 100 / 110 / 120 mm | 2 / 10 pcs |
| M6 | 150 mm | 1 / 5 pcs |
| M8 | 30 mm | 5 / 25 pcs |
| M8 | 35 / 40 / 45 / 50 / 60 / 70 / 80 mm | 2 / 10 pcs |
| M8 | 90 / 100 / 110 / 120 / 150 mm | 1 / 5 pcs |
| M10 | 30 / 35 / 40 / 45 / 50 / 60 / 70 mm | 2 / 10 pcs |
| M10 | 80 / 100 / 110 / 120 / 150 mm | 1 / 5 pcs |
| M12 | 40 / 45 mm | 2 / 10 pcs |
| M12 | 50 / 60 / 70 / 80 / 90 / 100 / 110 / 120 / 150 mm | 1 / 5 pcs |
Attach wooden table tops to metal frames, connect furniture legs to base plates, and join wooden rails to steel brackets — all with a clean, headless finish and no exposed bolt heads.
Use A2 stainless steel hanger bolts for garden benches, patio tables, and outdoor plant stands where moisture resistance is essential — no rust, no staining, no maintenance.
Secure heavy wooden workbench tops to steel leg frames using M10 or M12 hanger bolts — the dual-thread design handles load-bearing joints that regular screws can’t manage.
| Fastener Type | Hanger Bolt / Dowel Screw (Dual Thread, Headless) |
|---|---|
| Material | A2 (304) Stainless Steel |
| Grade | A2-70 |
| Thread Sizes | M4 / M5 / M6 / M8 / M10 / M12 |
| Length Range | 30 mm – 150 mm (varies by diameter) |
| Wood Thread End | Coarse lag-style wood screw thread, sharp self-tapping tip |
| Machine Thread End | ISO metric coarse thread (nut not included) |
| Head Style | Headless — smooth unthreaded center section |
| Finish | Raw stainless steel, no coating |
| Pack Options | 1 / 2 / 5 / 10 / 25 pieces (varies by size) |
| Application | Furniture legs, table tops, outdoor furniture, workbenches, wood-to-metal joints |
The most reliable method: thread two nuts onto the machine-thread end and lock them together (jam nut method), 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. Always pre-drill a pilot hole approximately 1mm smaller than the wood thread diameter to prevent splitting, especially near edges or in dense hardwood.
A pilot hole is strongly recommended in most cases. For M4–M6 in softwood, you may be able to drive without pre-drilling, but for M8 and larger, or in hardwood, always pre-drill. Use a bit approximately 1mm smaller than the wood thread diameter: M6 → 5mm bit, M8 → 7mm bit, M10 → 9mm bit, M12 → 11mm bit. Drill depth should match the wood thread length.
Yes. A2 (304) stainless steel resists rust from rain, humidity, and morning dew — suitable for garden benches, patio tables, and outdoor plant stands. For direct saltwater or coastal environments, 316 marine-grade stainless is recommended for long-term durability, but for most outdoor residential applications A2 performs well for many years.
A regular screw has a head (flat, pan, or hex) and is driven entirely into one material. A hanger bolt is headless — one end screws into wood, the other end protrudes with machine threads to accept a nut, threaded insert, or metal bracket. This creates a clean, flush connection between wood and metal without any exposed screw head on the finished joint.
For lightweight chair or side table legs, M6 or M8 is typically sufficient. For heavy dining tables or workbenches, M10 is a safer choice. Always check the thread size of your metal leg’s threaded insert or nut first — the machine thread end must match. If unsure, M8 is a good general-purpose choice for most standard furniture applications.
No — the machine thread end is designed to go into a nut, a pre-tapped metal hole, or a threaded insert. Do not attempt to drive the machine thread directly into untreated metal, as it will jam or strip. If connecting to aluminum or soft metal, you can tap a hole first using the appropriate metric tap, then thread the bolt in.
The terms are often used interchangeably, but there is a subtle difference. A dowel screw typically has wood screw threads on both ends and is used to join two pieces of wood. A hanger bolt has wood threads on one end and machine threads on the other, for connecting wood to metal. These bolts are hanger bolts — wood thread on one end, metric machine thread on the other.
