Description
When you’re repairing equipment or building something custom in the shop, you need fasteners that won’t let you down. This 3/8-inch carriage bolt is the go-to choice for connecting wood to metal or securing parts where you don’t want the bolt head spinning while you tighten the nut. The square shoulder sits flush in square holes or bites into wood, keeping everything lined up right.
What You’re Getting
- Grade 5 construction that’s 25% stronger than standard hardware store bolts
- Zinc coating protects against rust and corrosion from moisture and road salt
- Smooth dome head won’t snag on clothing or equipment moving past it
- Square shoulder prevents the bolt from spinning during installation
- Standard UNC threads work with any matching 3/8-inch nut
Built for Real Farm Work
This versatile bolt size handles medium-duty connections on everything from implement repairs to shop-built equipment. You’ll find 3/8-inch carriage bolts perfect for mounting guards, brackets, and panels where a clean finished look matters. The 1-1/4 inch length works great for connecting materials up to about an inch thick total.
Made to Last
Grade 5 bolts hit the sweet spot between strength and cost—they’re plenty strong for most farm applications without the premium price of Grade 8 hardware. The zinc plating helps them stand up to weather and won’t rust out on you in a season or two like plain steel bolts will.
Installation Notes
The square shoulder under the head needs to seat properly to prevent spinning. If you’re going through metal, drill a square hole or file the round hole square at the corners. For wood applications, just tap it in with a hammer and the square shoulder will bite in and hold. Always use a flat washer under the nut to distribute the load properly.
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