Description
When you need a fastener that won’t let you down under serious stress, this Grade 8 hex bolt delivers the strength you’re looking for. Whether you’re replacing a worn bolt on critical equipment or building something that needs to hold up to heavy loads and vibration, this bolt gives you the extra strength that Grade 8 steel provides—about 40% stronger than Grade 5 and twice as tough as standard hardware store bolts.
What You’re Getting
- Grade 8 steel construction for maximum strength in demanding applications
- Zinc finish protects against rust and corrosion in outdoor conditions
- UNC thread pitch for secure hold and easy installation with standard nuts
- 3-inch length handles thick materials and multi-layer assemblies
- 7/16-inch diameter perfect for medium-duty connections that need extra strength
Built for Real Farm Work
This size bolt works great for repairs and upgrades on tractors, implements, and shop-built equipment where you need that extra margin of safety. You’ll find this size holding together everything from cultivator frames to loader brackets, three-point hitch components to PTO assemblies. The 3-inch length gives you plenty of thread engagement when bolting through thick steel or connecting multiple pieces.
Made to Last
Grade 8 steel is heat-treated for maximum hardness and strength, making it the go-to choice when failure isn’t an option. The zinc coating helps it stand up to moisture, fertilizers, and road salt so it won’t rust out after a season or two in the field.
Installation Notes
This bolt requires a 11/16-inch wrench or socket. Use flat washers under both the head and nut to distribute the load properly and prevent galling. A dab of anti-seize compound on the threads makes future removal easier, especially in applications that might see heat or chemicals.


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