Wood-to-Wood Dowel Screws for Furniture Leg and Frame Joinery
The classic dowel screw has coarse wood-thread on both ends with a smooth or threaded center shank. It's the go-to fastener for attaching turned furniture legs to aprons, joining rail-and-stile frames, and creating end-grain-to-face-grain connections in tables, benches, and bed frames. Because there's no head, the joint closes completely flush — no plugs, no caps, no visible hardware. Available in 304 stainless steel and carbon steel from M4 through M12.
Hanger Bolts for Wood-to-Metal Furniture and Structural Connections
Hanger bolts combine a wood-thread end with a machine-thread end (metric or UNC), making them the right fastener when a wood component needs to bolt to a metal bracket, threaded insert, or nut. Common applications include attaching wood table legs to steel hairpin frames, mounting wood shelving to metal wall standards, and securing wood handrails to metal newel posts. HomeDIYer stocks hanger bolts in M6, M8, and M10 in zinc-plated steel and 304 stainless steel.
Double-Ended Threaded Furniture Screws for Flat-Pack and Knock-Down Assembly
Double-ended threaded furniture screws — sometimes called wood-to-metal dowels — have wood-thread on one end and a coarser machine thread on the other, designed to mate with a barrel nut or threaded insert embedded in the mating panel. They're the backbone of flat-pack furniture assembly: wardrobes, bookshelves, bed frames, and modular cabinet systems all rely on this fastener type for repeatable, tool-friendly knock-down joints that can be assembled and disassembled multiple times without losing holding strength.
Galvanized Dowel Screws for Outdoor Furniture and Pressure-Treated Lumber
Hot-dip galvanized and zinc-plated dowel screws are engineered for exterior applications where bare carbon steel would corrode within a single season. Use them to join pressure-treated deck framing members, assemble outdoor garden furniture, connect pergola posts to beams, and build raised garden bed corners. The zinc coating provides a sacrificial barrier against moisture and the alkaline chemistry of pressure-treated lumber, extending joint life significantly compared to uncoated fasteners.
Stainless Steel Hanger Bolts for Marine and High-Humidity Environments
316 stainless steel hanger bolts are the correct choice for boat interiors, dock furniture, coastal outdoor installations, and any environment where salt air or standing water is a factor. Unlike galvanized fasteners, 316 stainless does not rely on a surface coating — the entire fastener is corrosion-resistant throughout its cross-section, so there's no risk of coating failure exposing bare steel at the thread roots where corrosion typically initiates first.
Large-Diameter Dowel Screws M10–M16 for Structural Timber and Heavy Furniture
Heavy furniture builds — dining tables with thick solid-wood tops, workbenches, timber-frame bed frames — demand fasteners with enough shank diameter to resist the shear and withdrawal forces generated by daily use. M10 through M16 dowel screws and hanger bolts provide the cross-sectional area and thread engagement depth needed for structural timber joinery, post-and-beam connections, and large outdoor furniture where smaller fasteners would fatigue and loosen over time.
Frequently Asked Questions About Dowel Screws and Hanger Bolts
What are dowel screws used for?
Dowel screws are double-ended, headless fasteners with wood-thread on one end and machine-thread on the other — or wood-thread on both ends. They are used to join two pieces of wood end-to-end, attach furniture legs to frames, mount table tops to aprons, and create invisible joints in cabinetry and millwork where no exposed screw head is acceptable.
What is the difference between a dowel screw and a hanger bolt?
A dowel screw has wood-thread on both ends and is designed to join two wood members. A hanger bolt has wood-thread on one end and machine-thread (UNC or metric) on the other, allowing a wood component to be bolted to a metal bracket, threaded insert, or nut. Both are headless and installed with locking pliers or a double-nut technique.
Which material should I choose — stainless steel or galvanized?
304 or 316 stainless steel dowel screws and hanger bolts are the best choice for outdoor furniture, marine environments, and high-humidity applications because they resist rust without surface coatings that can flake. Galvanized carbon steel is a cost-effective option for protected outdoor use or pressure-treated lumber connections where the zinc coating provides adequate corrosion resistance.
How do I install a dowel screw without a head?
Thread two nuts onto the machine-thread end of the dowel screw and lock them against each other (double-nut method). Use a wrench on the outer nut to drive the wood-thread end into a pre-drilled pilot hole. Once seated, remove both nuts by spinning them in opposite directions. Alternatively, use locking pliers on the center shank if the screw is long enough to grip safely.
What pilot hole size do I need for a dowel screw?
Drill a pilot hole approximately 85–90% of the screw's root (minor) diameter. For an M6 dowel screw, a 5 mm pilot hole works well in hardwood; use 4.5 mm in softwood. For imperial sizes, a #8 dowel screw typically needs a 9/64" pilot hole in hardwood and 7/64" in softwood. Always test in scrap material first to confirm fit before driving into your workpiece.
Can dowel screws be used in softwood and hardwood?
Yes. Dowel screws work in both softwood and hardwood. In softwood (pine, cedar, spruce), the threads bite aggressively and holding strength is excellent. In hardwood (oak, maple, walnut), a properly sized pilot hole is critical to prevent splitting. For very dense hardwoods, apply a small amount of wax or soap to the threads to reduce driving torque and minimize the risk of shearing the screw.
What sizes of dowel screws and hanger bolts does HomeDIYer carry?
HomeDIYer stocks dowel screws and hanger bolts in metric sizes from M3 through M16, covering the most common furniture and structural joinery applications. Lengths range from 30 mm to over 100 mm depending on the diameter. Both stainless steel (304 and 316) and galvanized carbon steel options are available across the size range.
How do I join two pieces of wood end-to-end with a dowel screw?
Mark the center of each mating end grain face and drill a pilot hole to half the screw's length in each piece. Drive one end of the dowel screw into the first piece using the double-nut method until the midpoint of the screw is flush with the wood surface. Apply wood glue to the joint faces, then thread the second piece onto the exposed end by rotating it clockwise. Clamp until the glue cures for maximum joint strength.
How do I remove a stripped or seized dowel screw?
If the machine-thread end is accessible, thread two nuts onto it, lock them together, and use a wrench to back the screw out counterclockwise. If the screw is fully embedded in wood, use a screw extractor bit in a reversing drill. Apply penetrating oil and allow it to soak for 15–30 minutes before attempting removal to break any corrosion bond at the thread interface.
Does HomeDIYer offer free shipping on dowel screws and hanger bolts?
Yes. HomeDIYer offers free standard shipping on qualifying orders. Check the current free-shipping threshold at checkout — multi-pack dowel screw sets and hanger bolt assortments frequently meet the minimum in a single order, making it easy to stock up for your next furniture build or woodworking project without paying extra for delivery.
