Size 5/16-18 - Stainless Carriage Bolts

These type 18-8 stainless steel carriage bolts have a square neck to help keep the bolt in place during installation. Commonly used in treated lumber these bolts have a completely smooth head (no markings) to give it that nice, finished appearance. Length is measured from underneath the head and includes the square neck. (Longer sizes available upon request)
Please select the size below for more information.

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$0.00 $7.49
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The highest price is $7.49

  • Carriage Bolt Square Neck 5/16-18 x 3/4" Type 18-8 Stainless

    Carriage Bolt Square Neck 5/16-18 x 3/4" Type 18-8 Stainless
    $0.25 USD
    • 100 or more for $0.18 ea
    • 1000 or more for $0.17 ea

  • Carriage Bolt Square Neck 5/16-18 x 1" Type 18-8 Stainless

    Carriage Bolt Square Neck 5/16-18 x 1" Type 18-8 Stainless
    $0.25 USD
    • 100 or more for $0.24 ea
    • 1000 or more for $0.22 ea

  • Carriage Bolt Square Neck 5/16-18 x 1-1/4" Type 18-8 Stainless

    Carriage Bolt Square Neck 5/16-18 x 1-1/4" Type 18-8 Stainless
    $0.27 USD
    • 100 or more for $0.26 ea
    • 1000 or more for $0.24 ea

  • Carriage Bolt Square Neck 5/16-18 x 1-1/2" Type 18-8 Stainless

    Carriage Bolt Square Neck 5/16-18 x 1-1/2" Type 18-8 Stainless
    $0.40 USD
    • 100 or more for $0.38 ea
    • 1000 or more for $0.37 ea

  • Carriage Bolt Square Neck 5/16-18 x 1-3/4" Type 18-8 Stainless

    Carriage Bolt Square Neck 5/16-18 x 1-3/4" Type 18-8 Stainless
    $0.43 USD
    • 100 or more for $0.42 ea
    • 1000 or more for $0.4 ea

  • Carriage Bolt Square Neck 5/16-18 x 2" Type 18-8 Stainless

    Carriage Bolt Square Neck 5/16-18 x 2" Type 18-8 Stainless
    $0.48 USD
    • 100 or more for $0.4 ea
    • 1000 or more for $0.38 ea

  • Carriage Bolt Square Neck 5/16-18 x 2-1/2" Type 18-8 Stainless

    Carriage Bolt Square Neck 5/16-18 x 2-1/2" Type 18-8 Stainless
    $0.52 USD
    • 100 or more for $0.5 ea
    • 1000 or more for $0.48 ea

  • Carriage Bolt Square Neck 5/16-18 x 3" Type 18-8 Stainless

    Carriage Bolt Square Neck 5/16-18 x 3" Type 18-8 Stainless
    $0.55 USD
    • 100 or more for $0.52 ea
    • 1000 or more for $0.5 ea

  • Carriage Bolt Square Neck 5/16-18 x 3-1/2" Type 18-8 Stainless

    Carriage Bolt Square Neck 5/16-18 x 3-1/2" Type 18-8 Stainless
    $0.60 USD
    • 50 or more for $0.58 ea
    • 500 or more for $0.56 ea

  • Carriage Bolt Square Neck 5/16-18 x 4" Type 18-8 Stainless

    Carriage Bolt Square Neck 5/16-18 x 4" Type 18-8 Stainless
    $0.65 USD
    • 50 or more for $0.64 ea
    • 500 or more for $0.62 ea

  • Carriage Bolt Square Neck 5/16-18 x 4-1/2" Type 18-8 Stainless

    Carriage Bolt Square Neck 5/16-18 x 4-1/2" Type 18-8 Stainless
    $0.67 USD
    • 50 or more for $0.66 ea
    • 500 or more for $0.6 ea

  • Carriage Bolt Square Neck 5/16-18 x 5" Type 18-8 Stainless

    Carriage Bolt Square Neck 5/16-18 x 5" Type 18-8 Stainless
    $0.95 USD
    • 50 or more for $0.95 ea
    • 500 or more for $0.89 ea

  • Carriage Bolt Square Neck 5/16-18 x 6" Type 18-8 Stainless

    Carriage Bolt Square Neck 5/16-18 x 6" Type 18-8 Stainless
    $1.40 USD
    • 50 or more for $1.35 ea
    • 500 or more for $1.3 ea

  • Carriage Bolt Square Neck 5/16-18 x 8" Type 18-8 Stainless

    Carriage Bolt Square Neck 5/16-18 x 8" Type 18-8 Stainless
    $7.49 USD

    Discounts are available for selected products only!