What Are #16, #18, #20 and #24 Brass Wood Screws Used For?
Brass wood screws are commonly sized by gauge number. In general, the larger the number, the thicker and stronger the screw. Sizes #16, #18, #20 and #24 are considered large wood screws and are typically used in heavy-duty woodworking, construction, marine, restoration and decorative applications.
Brass is often chosen not only for its appearance, but also for its corrosion resistance, especially in applications where the fastener may be exposed to moisture or where a finished, decorative look is important.
Common Uses by Screw Size
| Screw Size | Typical Uses | Notes |
|---|---|---|
| #16 Brass Wood Screws | Heavy door hardware, large hinges, structural cabinetry and boat trim | A common large-duty woodworking screw |
| #18 Brass Wood Screws | Thick hardwood assemblies, antique restoration and decorative architectural work | Often used for specialty hardware applications |
| #20 Brass Wood Screws | Timber connections, marine woodworking and large brass fittings | Usually requires properly drilled pilot holes |
| #24 Brass Wood Screws | Very heavy timber fastening and industrial decorative applications | Rare in normal woodworking; typically a specialty fastener |
Why Use Brass Wood Screws?
Brass wood screws are softer than steel screws, but they offer several advantages in the right application. They are often used when corrosion resistance, appearance or nonmagnetic hardware is important.
Typical applications include:
- Antique furniture restoration
- Boat and yacht woodwork
- Decorative hinges and hardware
- Heavy cabinetry
- Architectural millwork
- Outdoor or moisture-prone trim applications
Installation Tips for Large Brass Wood Screws
Because brass is softer than steel, care should be taken during installation, especially when working with hardwoods. To reduce the risk of snapping the screw, it is usually best to drill a proper pilot hole before installation.
Many installers will also drive a similarly sized steel screw first to cut the threads, then remove it and install the brass screw. This can help the brass screw seat properly without excessive stress.
Approximate Major Diameters
| Screw Size | Approximate Diameter |
|---|---|
| #16 | ~0.268 in |
| #18 | ~0.294 in |
| #20 | ~0.320 in |
| #24 | ~0.372 in |
These are very large sizes for wood screws, so #20 and #24 brass wood screws are generally considered specialty or industrial fasteners rather than everyday hardware-store items.
Find Brass Wood Screws at Allied Bolt & Screw
Allied Bolt & Screw offers a wide selection of quality fasteners for woodworking, construction, restoration, marine and specialty applications. If you need large brass wood screws for your next project, visit:
