Midwest Fasteners Grade 2 / A307 Hot Dip Galvanized Steel Carriage Bolt

Midwest Fasteners Grade 2 / A307 Hot Dip Galvanized Steel Carriage Bolt

Midwest Fasteners carriage bolts are Grade 2 / A307 steel fasteners finished with a hot dip galvanized coating for reliable corrosion resistance in outdoor and exposed-weather work. This family covers coarse-thread diameters from 1/4"-20 through 1/2"-13, with lengths spanning 1" up to 12" depending on diameter, so you can match the right bolt to wood-to-wood, wood-to-metal, and general fastening jobs. Every size in the line shares the same classic carriage bolt profile: a smooth round head paired with a square neck that self-locks into wood or a matching square hole to stop the bolt from spinning while you drive the nut. Country of origin for this line is China.

Key Features

• Size Range: Coarse-thread diameters of 1/4"-20, 3/8"-16, and 1/2"-13, with lengths from 1" to 12" across the family.
• Material & Finish: Steel construction with a hot dip galvanized coating for strong corrosion resistance in damp, outdoor, or treated-lumber environments.
• Head & Neck Style: Smooth round carriage bolt head with a square neck that resists rotation when driven into wood or a matching square hole, so you don't need to hold the head while tightening the nut.
• Grade: Grade 2 / A307, suitable for general-purpose structural and fastening applications.
• Thread: Coarse thread for quick engagement and solid holding power in wood and with standard nuts.
• Finish Benefit: Hot dip galvanized coating helps protect against rust and extends service life versus bare or lightly plated steel.

Technical Specifications

• Refer to manufacturer documentation for complete technical specifications.

Typical Applications

• Wood deck and fence framing connections where a smooth bolt head is wanted on the finished face.
• Attaching wood to wood or wood to metal in outdoor structures exposed to moisture.
• General maintenance and repair fastening where a self-locking square neck bolt prevents spin-out.
• Fence gates, playground equipment, and outdoor furniture assembly.
• Agricultural and jobsite repairs needing a corrosion-resistant coarse thread bolt.

Why Midwest Fasteners?

Midwest Fasteners supplies this carriage bolt family in consistent Grade 2 / A307 steel with a hot dip galvanized finish across a full range of coarse-thread diameters and lengths, giving contractors and maintenance techs a dependable, corrosion-resistant option for outdoor wood and metal fastening. The square neck and smooth round head design delivers repeatable, no-spin installation on the jobsite, making this line a practical choice for repair and construction work where finish appearance and reliable holding power both matter, whichever size in the range you choose.