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When you need to join a wooden component to a metal bracket, frame, or tapped plate without any exposed bolt head, a standard screw or bolt simply won't do the job. These dual thread dowel screws solve that problem: one end carries a coarse self-tapping wood thread that bites directly into timber, plywood, or particle board; the other end has a standard ISO metric machine thread that accepts a nut or threads into a pre-tapped metal hole. The result is a completely hidden, flush fastener that holds wood and metal together cleanly.
Made from Grade 4.8 carbon steel with a color zinc (galvanized) finish, these hanger bolts resist everyday corrosion and provide reliable tensile strength for furniture assembly, machinery mounting, and structural joinery. Available in M6, M8, and M10 thread diameters with lengths from 30mm to 100mm (approximately 1.2" to 3.9"), sold in quantities from 1 to 100 pieces per order.
Typical applications include attaching table legs to metal aprons, mounting machinery feet to steel bases, securing wood panels to metal frames, and any project where a clean, headless wood-to-metal connection is required.
| Thread Size | Available Lengths | Quantity Options |
|---|---|---|
| M6 | 30 / 40 / 50 / 60 mm | 1 / 2 / 5 / 10 / 20 / 30 / 50 / 100 pcs |
| M8 | 40 / 45 / 50 / 55 / 60 / 70 / 80 / 90 / 100 mm | 1 / 2 / 5 / 10 / 20 / 30 / 50 / 100 pcs |
| M10 | 50 / 55 / 60 / 70 / 80 / 90 / 100 mm | 1 / 2 / 5 / 10 / 20 / 30 / 50 / 100 pcs |
Attach wooden table legs to metal aprons, secure shelf brackets to wood panels, or join cabinet components to metal frames — all with a clean, headless connection that keeps the finished piece looking professional.
Mount machinery feet, motor bases, and equipment supports to wooden workbenches or wooden sub-frames using M8 or M10 hanger bolts — the machine thread end accepts standard nuts for secure, adjustable clamping.
Connect wooden beams, posts, or panels to steel brackets, angle iron, or metal plates in construction, renovation, and structural DIY projects where a hidden fastener is preferred over exposed bolt heads.
| Fastener Type | Dual Thread Dowel Screw / Hanger Bolt |
|---|---|
| Material | Carbon Steel |
| Strength Grade | 4.8 |
| Surface Finish | Color Zinc (Galvanized) |
| Thread Sizes | M6 / M8 / M10 |
| Wood End Thread | Coarse self-tapping wood screw thread (no pre-tapping required) |
| Metal End Thread | ISO Metric machine thread (requires nut or pre-tapped hole) |
| Length Range | 30mm – 100mm (varies by thread size) |
| Head Style | Headless — no exposed head after installation |
| Quantity per Pack | 1 / 2 / 5 / 10 / 20 / 30 / 50 / 100 pcs (select above) |
| Application | Furniture assembly, machinery mounting, wood-to-metal structural joinery |
Use the jam nut (double nut) method: thread two M6/M8/M10 nuts onto the machine thread end and lock them tightly against each other. Use a wrench on the outer nut to drive the wood thread end into a pre-drilled pilot hole. Once the wood end is fully seated, remove both nuts. Alternatively, use locking pliers on the smooth center shank section carefully to avoid surface damage.
Drill a pilot hole slightly smaller than the thread's outer diameter. For M6 hanger bolts, typically 4.5–5mm; for M8, typically 6–6.5mm; for M10, typically 7.5–8mm. Softwoods require a smaller pilot hole; hardwoods need a slightly larger one to prevent splitting. Always test on scrap material first.
Yes. The machine thread end is not self-tapping — it requires either a pre-tapped hole in the metal component, a welded nut, a threaded insert, or a standard hex nut on the back side. If your metal bracket has a smooth hole, use a tap to thread it first, or simply secure the bolt with a nut and washer from the back.
The color zinc finish provides basic corrosion resistance suitable for dry indoor environments, workshops, and covered outdoor areas (porches, garages, carports). For direct rain exposure, ground contact, or coastal/marine environments, stainless steel hanger bolts are recommended for long-term durability.
The terms are often used interchangeably. Technically, a dowel screw has wood screw threads on both ends (used for wood-to-wood connections), while a hanger bolt has a wood thread on one end and a machine thread on the other (for wood-to-metal connections). The products listed here are hanger bolts — wood thread one end, metric machine thread the other.
Yes. M8 and M10 hanger bolts are commonly used to attach wooden bed legs or headboard posts to metal bed frames. Drive the wood end into the wooden component, then thread the machine end through the metal frame hole and secure with a nut and washer. Grade 4.8 strength is adequate for typical residential bed frame loads.
M6 (6mm) is suitable for light-duty furniture, cabinetry, and decorative fixtures where loads are minimal. M8 (8mm) handles general furniture assembly, shelving, and light machinery mounting. M10 (10mm) is for heavier structural connections, load-bearing furniture, and industrial mounting applications. When in doubt, size up — a larger bolt in a properly sized pilot hole is always stronger than an undersized one.
