Description

When you need hardware that locks in place and won’t back out from vibration, carriage bolts are your go-to fastener. The square shoulder under the head grabs into wood or metal and keeps the bolt from spinning while you tighten the nut—perfect for those tricky spots where you can only get a wrench on one side. This 5/16-inch by 2-inch size is just right for medium-duty connections around the farm.

What You’re Getting

Grade 5 strength that’s 25% stronger than hardware store bolts but won’t break your budget like Grade 8
Zinc coating protects against rust and corrosion, even in wet field conditions
Square shoulder design prevents bolt rotation during installation and keeps connections tight
UNC threads work with standard nuts and match most existing farm equipment hardware
2-inch length handles decent material thickness while still giving you thread engagement

Built for Real Farm Work

This size bolt works great on implement attachments, shop-built equipment, and repairs where you need something stronger than a regular hex bolt. This bolt size is perfect for medium to heavy-duty connections on tractors, implements, and shop-built equipment. You’ll find them holding gate hardware, loader brackets, and anywhere you’re bolting through lumber or moderate steel thickness.

Made to Last

Grade 5 bolts offer the sweet spot between strength and cost—they’re about 25% stronger than Grade 2 hardware store bolts but cost less than Grade 8. The zinc coating helps them stand up to moisture and road salt, so they won’t rust out on you in a season or two.

Good to Know

The square shoulder needs to bite into your material to work properly—it won’t spin in a round hole. Always use a flat washer under the head and nut to distribute the load properly. A little anti-seize compound on the threads makes future removal much easier, especially if the connection might see heat or road salt.