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Carriage Bolt Zinc Plated 307A Grade A Steel - 5/16'-18 x 2-1/4' FT - Qty-25

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About this item

A carriage bolt has a domed or countersunk head and the shank is topped by a short square section under the head of the bolt.
The square section grips into the part being fixed, preventing the bolt from turning when the nut is tightened.
Carriage bolts are often used to fasten wood panels or board to masonry or to one another.
The square shank of the bolt allows it to lock into place when inserted into a round hole in wood or a square hole in a metal strap, the unthreaded square shank pulls into the wood creating a tight connection.
Bolts Over 6" in length will have a shoulder beneath the head.

Product Description

Carriage Bolts - Zinc Plated Steel

Fully threaded down to the square section beneath the head which grips into the part being fixed (typically wood)
Commonly used to fasten wood panels to masonry or one another
Also features a domed head
307A Zinc plating offers an extra layer of corrosion resistance and a shiny finish to class 4.6 steel
Commonly used with hex nuts, flat washers, and wood applications

DESCRIPTION

Carriage bolts have a domed head, and the shank is topped by a short square section under the head of the bolt. The square section grips into the part being fixed, preventing the bolt from turning when the nut is tightened. Carriage bolts are often used to fasten wood panels or board to masonry or one another, as well as wood beams. The square shank of the bolt allows it to lock into place when inserted into a round hole in wood or a square hole in a metal strap, and the unthreaded square shank pulls into the wood, creating a tight connection. Shorter length carriage bolts are fully threaded(FT), while longer lengths may be partially threaded(PT). These will be designated in the listing having either FT or PT in the title.

Product Specifications

Material: 307A Zinc Plated Steel
Head Style: Dome
Filet Radius: 0.031
Head Diameter: Max 0.719 - Min 0.688
Head Height: Max 0.176 - Min 0.156
Square Neck Depth: Max 0.187 - Min 0.156
Square Neck Width: Max 0.324 - Min 0.307
Thread Diameter: 5/16"
Thread Size: 5/16"-18
Thread Pitch: 18 per Inch
Thread Direction: Right Hand
Thread Type: UNC Coarse
Standards met: REACH and RoHS Compliant
Sizing: Diameter - Thread Pitch x Overall Length

Carriage Bolts - Zinc Plated Steel

307A Zinc Plated Steel

307A Zinc plating offers an extra layer of corrosion resistance and a shiny finish to class 4.6 steel

Domed Head

Carriage bolts feature a domed, driver-less head with a short square section under the head of the bolt, preventing the bolt from turning when the nut is tightened.

Common Applications

Carriage bolts are commonly used for fastening wood beams and panels to masonry or to one another. The square shank of the bolt allows it to lock into place when inserted into a round hole in wood or a square hole in metal, the unthreaded square shank pulls into the wood creating a tight connection that locks the bolt into place.

Listing photo is generic for the fastener type listed in this listing and is not to scale. Please refer to the description for fastener details. If in doubt, please ask a question through chat or email. We will respond with the requested information quickly.

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Carriage Bolt Zinc Plated 307A Grade A Steel - 5/16'-18 x 2-1/4' FT - Qty-25

About this item

Product Description

Carriage Bolts - Zinc Plated Steel

307A Zinc Plated Steel

Domed Head

Common Applications