Stop Settling for Hardware That Rusts. Build it to Last.
This New Old Stock (NOS) 3/8" x 3-1/2" carriage bolt is manufactured with the quality and materials that have become hard to find. It's the perfect heavy-duty hardware for your most important projects, from rebuilding a wagon bed to constructing a river dock that will stand the test of time.
What sets this bolt apart is its true Hot-Dip Galvanized (HDG) finish. Unlike a simple electro-plated coating, hot-dipping creates a thick, durable, and self-healing layer of zinc that is metallurgically bonded to the steel. This provides superior, long-term protection against rust and corrosion, making it the natural economical choice for outdoor, marine, and high-moisture environments. The classic carriage bolt design features a smooth, domed head for a safe, finished look and a square neck that locks into wood to prevent the bolt from spinning as you tighten the nut.
This isn't just a bolt; it's an investment in doing the job right with hardware you can depend on.
Features & Benefits:
Superior Corrosion Resistance: Genuine Hot-Dip Galvanized (HDG) coating provides decades of protection against rust, far outlasting standard zinc plating.
Anti-Spin Square Neck: The square shoulder securely locks into wood or a square hole, allowing for easy one-tool tightening from the nut side.
Smooth, No-Snag Head: The low-profile, domed head provides a safe, finished appearance with no sharp edges, ideal for decks, railings, and furniture.
New Old Stock (NOS) Quality: Made with the robust steel and superior manufacturing standards of the past, ensuring you get a tougher, more reliable fastener.
Common Applications:
Dock, Pier, and Wharf Construction
Farm Implement and Wagon Repair
Trailer Bed Flooring and Wooden Side Rails
Fencing, Gate Assembly, and Post Fastening
Deck, Pergola, and Outdoor Structure Building
Playground Equipment and Park Benches
Specifications
| Attribute | Description |
| Diameter | 3/8′′ |
| Thread Pitch | 16 TPI (Coarse Thread) |
| Length | 3−1/2′′ (Measured from under the head) |
| Head Style | Round / Domed Carriage Head |
| Neck Style | Square |
| Finish | Hot-Dip Galvanized (HDG) |
| Material | Steel |
| Condition | New Old Stock (NOS) |
| Nut Compatibility | Requires 3/8"-16 Hot-Dip Galvanized Nut (Tapped Oversize) |
