Bulk 3/8"-24 Grade 8 Hex Cap Screws (Fine Thread, Alloy Steel, Plain)

High-Strength Fasteners for Industrial, Structural, and Equipment Use

For applications requiring extreme durability and precision, trust 3/8"-24 Grade 8 Hex Cap Screws. Manufactured from high-strength alloy steel with a plain (uncoated) finish, these fasteners deliver superior performance in high-load conditions. Featuring fine-thread (UNF) technology, they offer greater clamping force and vibration resistance, making them ideal for heavy equipment, structural applications, and industrial machinery.

Note – PT = Partial Thread

Key Features

• Diameter: 3/8 inch
• Thread Size: 3/8"-24 – UNF (Fine) Thread
• Length Options: Multiple lengths available for various applications
• Thread Length: Fully or partially threaded, depending on total screw length
• Wrench Size (Across Flats): Approximately 9/16 inches (standard hex head)
• Material: Grade 8 high-strength alloy steel
• Finish: Plain (uncoated) – suitable for applications that don’t require additional corrosion protection
• Type: Hex Cap Screw
• System of Measurement: Inch (Imperial / US)
• Specifications: Meets ASTM B18.2.1 standards
• Matching Nuts & Washers: 3/8"-24 Nuts & Washers Available Here

Bulk Ordering Advantages

Buying in bulk reduces your per-piece cost and ensures a steady supply of industrial-grade fasteners. These hex cap screws are ideal for steel fabrication, heavy equipment repairs, industrial construction, and large-scale mechanical applications.

Material Properties

• Superior Load Capacity: Grade 8 alloy steel handles extreme torque and stress.
• Plain Finish: Uncoated steel for cost-efficient, direct-use applications.
• Fine Thread Strength: UNF threading provides greater clamping force and vibration resistance.

Ideal Applications

• Heavy Machinery & Industrial Equipment
• Steel Construction & Structural Reinforcement
• Bridge & Infrastructure Projects
• Mining, Oil & Gas Industry
• Maintenance, Repair & Overhaul (MRO)

Why Choose Monster Bolts?

Since 2012, Monster Bolts has been the go-to supplier for high-strength industrial fasteners, offering:

• Top-Quality Materials: All screws meet ASTM B18.2.1 specifications.
• Competitive Bulk Pricing: Save more on high-volume orders.
• Fast Shipping & Large Inventory: Minimize project delays with ready-to-ship stock.
• Expert Support: Our team can assist with product selection and bulk purchasing.

Installation Tips

• Use an appropriately sized wrench or impact socket to prevent head damage.
• Lubricate and clean threads before installation for accurate torque application.
• Pair with Grade 8 nuts and washers for maximum load distribution and joint integrity.

Note: Nuts and washers are sold separately.

Order in Bulk & Save

Secure your supply of 3/8"-24 Grade 8 Hex Cap Screws today. Perfect for heavy construction, industrial assembly, and mechanical applications. Order now and enjoy bulk discounts, fast shipping, and expert customer service.

✔️ Best for industrial, structural, and heavy machinery projects

✔️ Fine-thread UNF design for superior clamping strength

✔️ ASTM B18.2.1 compliant for guaranteed strength & durability