Product Description
OZCO OWT 1/2" Timber Bolts — Self-Adjusting, Black Powder-Coated (Multiple Lengths)
- Self-adjusting timber bolts — 1/2" diameter through-bolts designed for large posts, beams, and heavy timber connections.
- Clean, finished look — Decorative hardware style with a low-profile head for projects where appearance matters.
- Exterior-ready finish — Corrosion-resistant, black powder-coat over robust steel for outdoor structures.
- Multiple lengths — Choose the bolt length to match your timber thickness and connection stack-up.
- OWT system compatible — Pairs well with OWT structural plates and brackets on pergolas, pavilions, decks, and fences.
OZCO OWT 1/2" Timber Bolts give you the strength of a through-bolt with the refined look that OWT hardware is known for. The self-adjusting head helps maintain a tight, finished connection as timbers season, while the black powder-coated finish blends with other OWT accents for a cohesive project style. Use them on pergolas, porch roofs, heavy fences, and deck framing where both capacity and appearance are important. For a complete, matching build, consider pairing with OWT Laredo Sunset Post Bases, OWT Beam Hangers, or OWT Rafter Seams to keep the look consistent throughout the structure.
Specifications
| Diameter | 1/2" (12.7 mm) |
| Lengths | Multiple sizes available (select to match timber thickness and hardware stack-up) |
| Head / Style | Low-profile, self-adjusting decorative head for a finished look |
| Finish | Black powder-coated, exterior-grade corrosion resistance |
| Material | Steel fastener (exterior-rated finish) |
| Typical Uses | Pergolas, pavilions, porch roofs, deck beams, heavy fence frames, and other timber-to-timber or timber-to-steel plate connections |
| System Compatibility | Coordinates with OWT brackets, plates, and hangers (e.g., Laredo Sunset & Ironwood series) |
Installation (Quick Steps)
- Size selection — Measure total thickness (member + plate/washer stack) and choose a bolt that provides full thread engagement with protruding length for the nut.
- Layout & drill — Mark centers, then drill a straight 1/2" pilot through members; keep holes aligned for an easy fit-up.
- Assemble — Insert the timber bolt, add washer/nut as required, and snug to seat hardware flush.
- Final torque — Tighten until the connection is firm; re-check after initial wood seasoning. Avoid over-torque that could crush fibers.
Buying Guide
- Which length? Add up material thickness and hardware plates; select a length that leaves adequate thread for the nut and a clean finish.
- Aesthetics — Use with matching OWT black hardware (e.g., post bases or flush plates) to keep a uniform look.
- Environment — For coastal or high-corrosion sites, combine with best-practice sealing and periodic inspection of exterior fasteners.
- Alternative fastening — If you need faster, tool-only installs without through-boring, consider structural screws for certain joints; use bolts where code or load requires.
Why Choose This
- Strength + style — Through-bolt performance with a finished, decorative head that matches OWT brackets.
- Self-adjusting head — Helps maintain a snug, professional-looking connection as timbers season.
- Built for outdoors — Exterior-grade, black powder-coated finish complements other OWT components.
Frequently Asked Questions
- What length 1/2" Timber Bolt should I choose for my project?
- Measure the total thickness of the members and any plates/washers, then choose a length that provides full thread engagement and enough protrusion for the nut without excessive stick-out.
- Are these 1/2" Timber Bolts suitable for use with pressure-treated lumber?
- Yes, they’re designed for exterior projects and commonly used with treated wood; follow local code and best practices for treated-lumber connections.
- Do these bolts match other OZCO OWT hardware finishes?
- Yes. The black powder-coat is designed to coordinate with OWT brackets, hangers, and plates for a cohesive look.
- When should I use a timber bolt instead of structural screws?
- Use through-bolts where code, load, or joint geometry requires clamping force through the member; use structural screws for faster installs on approved joints.
Comparison
- OWT 1/2" Timber Bolts (this product) — Self-adjusting, decorative through-bolts for high-strength timber joints and a finished look.
- OWT 3/4" Timber Bolts — Larger diameter for heavier loads or thicker member stacks while maintaining the same OWT black, decorative style.
- OWT Beam Hangers — Pre-engineered connectors for beam-to-beam or beam-to-post joins when a hanger solution is preferred.
- OWT Flush Plate Connectors — Plate-style connectors that spread load and add style where exposed hardware is desired.
Installation
Download the OZCO 3/4" Timber Bolt Installation Manual
Warranty
See the OZCO Building Product's warranty here
Resources
OZCO OWT Timber Bolt / Screw ASTM Certification
OZCO-OWT 3/4" Timber Bolt Salt Spray Report
OZCO Project #209 - 10x20 Pavilion 6x6 Posts
OZCO Project #216 - 12x20 Pavilion with 6x6 Posts
OZCO Porject #220 - Pavilion-Pergola Combo with Bar
