Grade 8 Hex Bolt 3/8 Inch x 4 Inch with Zinc Finish

Description

When you need a fastener that won’t let you down under pressure, this Grade 8 hex bolt is what you want in your toolbox. Whether you’re mounting brackets, securing implement frames, or tackling custom fabrication projects around the farm, this bolt delivers the strength to handle serious loads without backing down. When you’re fixing or building equipment that needs to stay together under pressure, you want fasteners you can count on.

What You’re Getting

• Grade 8 steel construction—about 50% stronger than Grade 5 bolts for critical connections
• Zinc coating that fights off rust and corrosion in harsh farm conditions
• UNC thread pitch that works with standard nuts and threaded holes
• 4-inch length perfect for bolting through thick steel or multiple components
• 3/8-inch diameter provides solid strength without being overkill for lighter applications

Built for Real Farm Work

This bolt size hits the sweet spot for medium-duty connections on tractors, implements, and shop-built equipment. You’ll find it’s just right for securing toolbox mounts, bracket assemblies, hydraulic line clamps, and custom modifications where you need something tougher than hardware store bolts but don’t want to go overboard with larger sizes. The 4-inch length gives you plenty of thread engagement even when bolting through thick material.

Made to Last

Agricultural machinery needs fasteners it can rely on during heavy-duty operations, in outdoor environments, and under other conditions that demand high-quality, sturdy hardware The Grade 8 rating means this bolt can handle high-stress loads without stretching or failing. The zinc finish provides solid corrosion protection against moisture, fertilizers, and road salt that would eat up uncoated bolts in no time.

Good to Know

Grade 8 bolts require a 9/16-inch wrench or socket. Always use a flat washer under both the head and nut to distribute the load properly and prevent pulling through thin metal. If you’re replacing rusted bolts, clean out the threads with a tap first. A little anti-seize compound on the threads makes future removal much easier, especially in high-vibration applications.