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Joining two pieces of wood without exposed bolt heads or back-side nuts is a common challenge for furniture makers, cabinet builders, and DIY repair enthusiasts. These double ended threaded dowel screws solve that problem cleanly — one end bites into wood, the other end provides a threaded stud for the mating piece, creating a strong hidden connection.
Available in metric diameters M4, M5, M6, M8, M10, and M12, with lengths ranging from 30 mm (~1-3/16") to 100 mm (~3-15/16"). Choose A2 stainless steel for corrosion resistance in damp or outdoor environments, or color zinc-plated carbon steel for economical indoor use. Sold in packs of 1, 5, 10, or 30 for flexible project quantities.
Typical applications include bed frame assembly, table leg attachment, cabinet knock-down fittings, chair repair, and structural timber connections — anywhere a clean, nut-free threaded joint is needed.
Build or repair bed frames, dining tables, and chairs with clean hidden joints — no exposed bolt heads on finished surfaces.
Create knock-down cabinet fittings and panel connections that can be disassembled and reassembled without damaging the wood.
Fix wobbly chair legs, reattach table aprons, or reinforce shelving units using the correct metric size for a secure, lasting repair.
Use A2 stainless steel variants for garden benches, patio furniture, or damp workshop environments where rust resistance matters.
| Product Type | Double Ended Threaded Dowel Screws (Furniture Connector Screws) |
|---|---|
| Material Options | A2 Stainless Steel / Carbon Steel with Color Zinc Plating |
| Thread System | Metric (M4, M5, M6, M8, M10, M12) |
| Thread Type | Double-ended, self-tapping coarse thread |
| Available Lengths | 30 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm (varies by diameter) |
| Pack Quantities | 1, 5, 10, or 30 pieces per pack |
| Typical Applications | Furniture assembly, cabinet joinery, bed frames, table legs, structural timber connections |
| Corrosion Resistance | A2 stainless: excellent for damp/outdoor use; Zinc-plated: suitable for dry indoor environments |
| Installation | Requires pilot hole; no nuts or washers needed for wood-to-wood joints |
Drill a pilot hole slightly smaller than the screw's outer diameter into the first piece of wood. Use a hex key or locking pliers on the center section (if present) to drive one end into the wood until flush or slightly recessed. The protruding end then screws into a matching pilot hole in the second piece, pulling both parts together tightly.
For standard wood-to-wood joints, no nuts or washers are needed — both ends are self-tapping and grip the wood directly. If you're using the protruding end to attach a metal bracket or thin panel, adding a nut on the exposed thread provides extra security.
Choose A2 stainless steel for outdoor furniture, garden benches, or damp environments like basements and workshops — it resists rust significantly better. Zinc-plated carbon steel is a cost-effective choice for dry indoor applications such as bed frames, bookshelves, and kitchen cabinets, where basic moisture protection is sufficient.
M4 is suited for small, lightweight furniture like jewelry boxes or chair spindles. M5–M6 covers most general cabinet and table assembly. M8 handles heavier applications like bed frames and workbenches. M10–M12 is for structural timber connections or large outdoor furniture. As a general rule: the thicker and heavier the wood, the larger the diameter you need.
Typically drill a pilot hole approximately 0.5–1 mm smaller than the screw's nominal diameter. For example, an M6 screw would generally use a 5–5.5 mm pilot hole in softwood, or closer to 5.5 mm in hardwood to reduce splitting risk. Always test on scrap material first.
Yes, though holding strength in MDF and particleboard is generally lower than in solid wood. For best results in these materials, use a slightly smaller pilot hole and consider applying wood glue alongside the screw for added strength. M6 or larger diameters are recommended for structural connections in sheet materials.
They are similar in concept but not identical. Hanger bolts typically have a wood-screw thread on one end and a machine thread on the other, designed to accept a nut. These double ended threaded dowels have self-tapping threads on both ends, making them suited for wood-to-wood joints without nuts. Check your application requirements before ordering.
