Description

When you’re fixing equipment or building something that needs to stay put, a good carriage bolt makes all the difference. This 5/16-inch by 2-1/2-inch carriage bolt gives you the smooth, rounded head that won’t snag on anything and the square shoulder that keeps it from spinning when you tighten the nut. It’s the kind of fastener that does its job without causing headaches.

What You’re Getting

Grade 5 strength that’s about 25% stronger than hardware store bolts but won’t break the budget
Zinc plating that fights off rust and corrosion from moisture and road salt
Square shoulder design prevents the bolt from turning when you’re tightening
Smooth round head that won’t catch on clothing, equipment covers, or moving parts
2-1/2-inch length handles thick materials or multiple pieces bolted together

Built for Real Farm Work

This size works great for medium-duty connections on implements, shop-built equipment, and tractor accessories. You’ll find these bolts perfect for mounting brackets, securing guards and shields, or any application where you need a clean-looking fastener that stays tight. The 5/16-inch size is ideal when 1/4-inch feels too small but 3/8-inch is overkill.

Made to Last

Grade 5 bolts hit that sweet spot between strength and cost-effectiveness. The zinc coating helps them stand up to the weather and won’t rust out on you after a season or two of outdoor use. These are built to handle the vibration and stress that comes with farm equipment use.

Installation Notes

Use a flat washer under the nut to distribute the load properly and prevent the nut from digging into softer materials. The square shoulder seats into the hole to prevent spinning, but make sure your hole size matches the bolt diameter for a snug fit. A little anti-seize compound on the threads makes future removal much easier.