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Top rated carriage bolts

AI-generated summary · updated July 28, 2026 · verify details before purchase.

  1. Best overall

    Everbilt 1/4-20 x 1-1/2 in. Zinc-Plated Carriage Bolt

    4.7/5 $5-$10

    Rust-resistant zinc-plated carriage bolt with a square neck for secure fastening; widely used in wood-to-wood and wood-to-metal applications.

    • Good corrosion resistance
    • Easy to install
    • Popular size
    • Not for heavy loads
  2. Best heavy-duty pick

    The Hillman Group 1/2-13 x 6 in. Hot Dipped Galvanized Carriage Bolt

    4.5/5 $15-$25

    Hot-dipped galvanized finish for exceptional durability; ideal for outdoor and construction projects requiring high strength.

    • Excellent corrosion protection
    • Strong and sturdy
    • Good for outdoor use
    • Price higher than average
  3. Best stainless steel

    Crown Bolt 5/16-18 x 1 in. Stainless Steel Carriage Bolt

    4.6/5 $8-$14

    304 stainless steel carriage bolt with high resistance to rust and chemicals; perfect for marine or humid environments.

    • Rust-resistant stainless steel
    • Durable in harsh conditions
    • Clean finish
    • Limited size availability
  4. Best value

    APA 3/8-16 x 4 in. Grade 5 Carriage Bolt

    4.4/5 $10-$18

    Grade 5 steel carriage bolt with medium carbon content for strength; offers a great balance of price and performance.

    • Good strength-to-cost ratio
    • Reliable for general use
    • Available in bulk
    • Not as corrosion resistant
  5. Best large size

    Fastenal 1/2-13 x 8 in. Zinc Plated Carriage Bolt

    4.3/5 $12-$20

    Long 8-inch zinc-plated carriage bolt suitable for thick materials; commonly used in decking and heavy timber construction.

    • Extra length for thick materials
    • Zinc coating protects
    • Good for construction
    • May require pre-drilling
  6. Best for light duty

    Huot 1/4-20 x 2 in. Stainless Steel Carriage Bolt

    4.2/5 $7-$12

    Compact stainless steel carriage bolt for light fastening tasks; suitable for furniture and small hardware projects.

    • Small, neat size
    • Stainless steel resists rust
    • Affordable
    • Not for heavy loads
    • Limited thread length
  7. Best for outdoor decor

    GRAINGER APPROVED 3/8-16 x 3 in. Hot Dipped Galvanized Carriage Bolt

    4.1/5 $10-$16

    Hot-dipped galvanized bolt with a smooth dome head; often used in outdoor furniture and playground equipment.

    • Smooth, finished look
    • Good weather resistance
    • Easy to tighten
    • Can be pricey per bolt
  8. Best kit

    E-Z Ancor 1/4-20 x 1-1/2 in. Carriage Bolt with Lock Nut

    4.0/5 $6-$10

    Includes matching lock nuts for a complete fastening solution; convenient for quick projects and repairs.

    • Comes with nuts
    • Convenient package
    • Decent quality
    • Nuts may loosen over time

Buying advice

When choosing carriage bolts, consider the material (zinc-plated for indoor, galvanized or stainless for outdoor), diameter and length requirements, and whether you need a matching nut. For heavy loads, opt for Grade 5 or higher. Check that the bolt's square neck matches the hole shape to prevent spinning during tightening.

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