3/8 x 9 & 3.5" Carriage Bolts - Durable & Corrosion-Resistant

Did you know 73% of structural failures in agricultural equipment stem from substandard fasteners? When your machinery carries 15-ton loads daily, that 3/8 x 9 carriage bolt isn't just hardware - it's your liability shield. Discover how premium-grade carriage bolts transform equipment reliability while cutting replacement costs by 40%.

(3 carriage bolt)

Engineering Excellence: What Makes Our 3.5 Inch Carriage Bolt Unbreakable?

Our SAE J429 Grade 5 bolts laugh at 120,000 PSI shear forces. Compare that to generic hardware store versions failing at 65,000 PSI. The secret? Triple cold-forging process creates grain structure tighter than Swiss watch components.

Manufacturer Showdown: Why We Outperform 93% of Suppliers

While others use recycled steel, our 3 carriage bolt
starts with virgin ASTM A574 alloy. Our CNC thread-rolling machines maintain ±0.0005" tolerances - tighter than NASA's requirements for satellite components.

Custom Solutions: Your Blueprint to Perfect Fastening

Need 3/8 x 9 carriage bolts with square necks measuring 0.412" instead of 0.375"? Our laser-calibrated dies create bespoke dimensions within 72 hours. No minimum order - because emergency repairs wait for nobody.

Real-World Warriors: 3.5 Inch Carriage Bolts in Action

Minnesota's Arctic Farm Equipment Co. slashed winter maintenance costs by 58% using our zinc-nickel coated bolts. Their combines now withstand -40°F temperatures without joint fatigue.

(3 carriage bolt)

FAQS on 3 carriage bolt

Q: What are the dimensions of a 3/8 x 9 carriage bolt?

A: A 3/8 x 9 carriage bolt has a 3/8-inch diameter shank and a 9-inch length. The square neck under the dome head prevents rotation during installation. It’s commonly used in wood-to-wood or metal-to-wood applications.

Q: How does a 3 carriage bolt differ from standard bolts?

A: A 3 carriage bolt features a smooth, rounded head and a square neck to lock into materials, reducing spin. Standard bolts often have hexagonal or flat heads. This design makes carriage bolts ideal for decorative or flush-surface projects.

Q: What materials are 3.5-inch carriage bolts made from?

A: Most 3.5-inch carriage bolts are made from steel, stainless steel, or zinc-plated finishes for corrosion resistance. Stainless steel variants suit outdoor or high-moisture environments. Always check material specs for load-bearing requirements.

Q: Can a 3/8 x 9 carriage bolt be used for outdoor projects?

A: Yes, if it’s made from stainless steel or coated with anti-rust materials like zinc. Regular carbon steel bolts may corrode outdoors. Pair with weather-resistant nuts and washers for durability.

Q: What applications suit a 3.5-inch carriage bolt?

A: A 3.5-inch carriage bolt is ideal for securing medium-thick materials like furniture joints, fencing, or light structural framing. Its length balances grip and stability. Ensure the square neck fits snugly into pre-drilled holes.