Bulk 5/16"-24 Grade 8 Hex Cap Screws (Zinc Yellow CR+6 Bake, UNF)

High-Precision Fasteners for Industrial & Automotive Applications

Boost the strength and reliability of your assemblies with our 5/16"-24 Grade 8 Hex Cap Screws, treated with a zinc-yellow CR+6 bake to deliver exceptional corrosion resistance. Engineered with fine-thread (UNF) design, these screws offer tighter clamping force, making them ideal for automotive, machinery, and other high-stress industrial projects.

Note – PT = Partial Thread

Key Features

• Diameter: 5/16 inch
• Thread Size: 5/16"-24 – UNF (Fine) Thread
• Length Options: Multiple lengths to match various project needs
• Thread Length: May be fully or partially threaded depending on overall screw length
• Wrench Size (Across Flats): 1/2 inch (standard hex head)
• Material & Finish: Grade 8 alloy steel with zinc-yellow CR+6 bake
• Type: Hex Cap Screw
• System of Measurement: Inch (Imperial / US)
• Specifications: Conforms to ASTM B18.2.1
• Matching Nuts & Washers: 5/16"-24 Nuts & Washers Available Here

Bulk Ordering Advantages

When you purchase these Grade 8 hex cap screws in bulk, you significantly lower your per-piece costs and ensure a steady supply of durable fasteners. This is especially beneficial for manufacturers, automotive shops, and industrial facilities handling large-scale or continuous projects.

Material Properties

• Grade 8 Strength: Engineered to handle high torque and load requirements.
• Corrosion Resistance: Zinc-yellow CR+6 plating protects against rust and environmental wear.
• Fine Thread Precision: UNF threads enhance clamping force and resist loosening from vibration.

Ideal Applications

• Automotive & Engine Assembly
• Industrial Machinery & Equipment
• Precision Manufacturing & Fabrication
• Maintenance, Repair & Overhaul (MRO)
• General Construction & Engineering Projects

Why Monster Bolts?

Since 2012, Monster Bolts has been a leading supplier of industrial-grade fasteners, offering:

• Reliable Quality: Our screws meet ASTM standards, ensuring consistent performance.
• Competitive Bulk Pricing: Reduce project costs by purchasing larger volumes.
• Wide Inventory & Fast Shipping: Keep your workflow on track with prompt order fulfillment.
• Expert Support: Our knowledgeable team is ready to assist with product selection and technical inquiries.

Installation Tips

• Use the correct wrench or impact socket to avoid damaging the screw head or threads.
• Clean and lubricate threads before assembly for accurate torque readings and a secure hold.
• Pair with matching Grade 8 nuts and washers to maximize joint integrity and load distribution.

Note: Nuts and washers are sold separately.

Stock Up on Bulk Supplies

Don’t compromise on quality or performance. Order 5/16"-24 Grade 8 Hex Cap Screws in bulk today and benefit from cost savings, quick shipping, and the professional support that makes Monster Bolts a trusted name among industrial and automotive experts.

✔️ Preferred by professionals in automotive, industrial, and construction

✔️ Zinc-yellow CR+6 finish ensures robust corrosion protection

✔️ Meets ASTM B18.2.1 standards for proven reliability