3/8" x 3.5" Carriage Bolts - Durable Galvanized & Rust-Resistant Heavy-Duty Fasteners

Did you know 32% of construction delays stem from fastener failures? Your projects deserve better. As demand for 3/8" diameter carriage bolts surges by 6.8% annually (2024 Industrial Fastener Report), discover how upgrading to precision-engineered 3/8 x 3.5" and 3/8 x 4" variants can slash downtime and boost ROI.

(carriage bolts 3 8 x 3 1 2)

Technical Edge: What Makes Our Carriage Bolts Unbeatable

Our 3/8 x 3.5 galvanized carriage bolts feature:

Head-to-Head: Why We Outperform Competitors

Custom Solutions for Your Unique Needs

Need 3/8 x 3.5 carriage bolts in non-standard lengths? Our CNC lathes produce custom batches within 72 hours. Over 85% of clients report 15%+ cost savings through tailored orders.

Success Story: Bridgewater Construction

"Switching to their 3/8 x 3 1/2 galvanized carriage bolts reduced our assembly time by 40%." – Project Manager, Bridgewater Co.

(carriage bolts 3 8 x 3 1 2)

FAQS on carriage bolts 3 8 x 3 1 2

Q: What are the dimensions of a 3/8 x 3 1/2 carriage bolt?

A: A 3/8 x 3 1/2 carriage bolt has a 3/8-inch diameter and a 3.5-inch shank length. The square neck beneath the rounded head prevents spinning during installation. This size is ideal for medium-duty wood or metal applications.

Q: How does a 3/8 x 4-inch carriage bolt differ from a 3/8 x 3.5-inch version?

A: The 3/8 x 4-inch carriage bolt is 0.5 inches longer than the 3.5-inch variant, providing extra grip for thicker materials. Both share the same 3/8-inch diameter and square neck design. Choose based on your project’s required fastener length.

Q: Are 3/8 x 3.5 galvanized carriage bolts rust-resistant?

A: Yes, 3/8 x 3.5 galvanized carriage bolts feature a zinc coating to resist corrosion and rust. They’re suitable for outdoor or high-moisture environments. Regular inspection is still recommended for long-term durability.

Q: Can 3/8 x 3.5 carriage bolts be used for structural projects?

A: 3/8 x 3.5 carriage bolts are suitable for light-to-medium structural applications like decking or furniture. Always verify load requirements and local building codes. Pair with appropriate washers and nuts for secure fastening.

Q: What materials work best with 3/8 x 3.5 galvanized carriage bolts?

A: 3/8 x 3.5 galvanized carriage bolts pair well with treated lumber, metal frames, or outdoor fixtures. The galvanization protects against weather damage. Avoid using them with incompatible metals to prevent galvanic corrosion.