The Hillman 9/16 in. D x 5 in. L Hex Head Cap Screw is a purpose-built fastener for heavy-duty assemblies where strength really matters. Crafted from heat-treated steel and graded as 8, this screw is designed to stand up to demanding applications and keep joints secure over time.
Key features you’ll notice on the job site include a robust 9/16" diameter and a substantial 5" length, delivering plenty of bite for thick material connections. The coarse thread enhances drive speed and holds well in a range of base materials, making it versatile for both metal-to-metal and wood-to-metal projects. The hex head offers a familiar, tool-friendly drive with standard wrenches or sockets, so you can work fast without sacrificing torque against tough loads.
Specifications
- Diameter: 9/16 in (approx. 14.29 mm)
- Length: 5 in (approx. 127 mm)
- Thread Type: Coarse
- Material: Steel; Finish: Heat Treated; Grade: 8
- Packaging: Boxed, 25 screws per box
Ideal uses and scenarios
- Heavy-duty automotive, machinery, and equipment assemblies where a high-strength fastener is required
- Structural brackets, metal-to-metal joints, and metal fixtures that demand reliable shear and pull strength
- Wood-to-metal connections in construction or framing projects that need a longer, stronger bite
- Fencing, decking, and outdoor hardware where corrosion resistance is balanced with high-strength performance (paired with appropriate nuts and washers)
Why choose Hillman Grade 8 heat-treated hex screws
- High-strength steel designed to resist deformation under load, reducing loosening from vibration
- Heat-treated finish for enhanced hardness and wear resistance in demanding environments
- Stocked in convenient 25-piece boxes for rapid project readiness and organized inventory
- Bulk capability with a long, precise thread that provides dependable gripping power across multiple materials
For builders, fabricators, and DIY enthusiasts tackling tough assemblies, this Hillman hex head cap screw combines strength, reliability, and practical design in a single, ready-to-use package. Select the 9/16 x 5 in. Hillman Grade 8 heat-treated bolt for trustworthy performance where it counts, and pair with compatible nuts and washers to maximize load distribution and durability.
