ARP Hex Bolt Kits

5/16˝-24 SAE Bolt Kit for Automotive, Marine, and Trailer Applications

Part #: 751-3500

Overview

The ARP Hex Bolt Kits are high-performance fasteners designed for enthusiasts and professionals who demand the best in strength, durability, and reliability. Crafted from premium-quality chromoly steel, these bolts are engineered to provide a secure and lasting connection in a variety of automotive, marine, and trailer applications. Whether you're assembling a custom engine build, securing trailer components, or performing maintenance on your boat, these bolts offer the strength and precision you need to get the job done right.

Designed with safety and performance in mind, ARP's hex bolt kits are ideal for those who want to ensure their hardware can withstand demanding conditions. The heat-treated 8740 chromoly construction and black oxide finish not only enhance corrosion resistance but also contribute to the overall strength and longevity of the fasteners. With a tensile strength rated at 180,000 psi, these bolts provide a significant safety margin over standard Grade 8 hardware, making them suitable for high-stress environments and critical applications.

Key Features

ARP Hex Bolt Kits incorporate several advanced features that set them apart from standard fasteners:

• Premium Material: Made from heat-treated 8740 chromoly steel, these bolts deliver exceptional strength and durability for demanding applications.
• High Tensile Strength: Rated at 180,000 psi, providing a substantial safety margin over typical Grade 8 hardware, ideal for high-stress environments.
• Corrosion Resistance: Finished with a black oxide coating that helps protect against rust and corrosion, extending the lifespan of the fasteners.
• Precision Manufacturing: Manufactured to strict tolerances to ensure proper fitment and consistent performance across every kit.
• Versatile Compatibility: Suitable for a wide range of applications including automotive, marine, and trailer assembly, thanks to the standard 5/16˝-24 thread size.
• Secure Flanged Hex Head: Designed with a flanged hex head for easy installation and removal using standard tools, providing a reliable grip during tightening.
• Optimal Underhead Length: The 3.500-inch underhead length ensures proper engagement and load distribution for secure fastening.

Construction & Design

The ARP Hex Bolt Kits are meticulously engineered with a focus on strength and reliability. The use of heat-treated 8740 chromoly steel ensures that each bolt can withstand high tensile loads and harsh conditions. The black oxide finish not only enhances corrosion resistance but also provides a sleek, professional appearance. The flanged hex head design allows for easy torque application and reduces the risk of stripping or rounding during installation.

The precise manufacturing process ensures that each bolt maintains tight tolerances, resulting in a consistent fit and reliable performance. The 5/16˝-24 thread size is a common standard, making these bolts compatible with a wide range of components and assemblies. The 3.500-inch underhead length provides ample engagement depth, ensuring a secure and stable connection in various applications.

Performance & Reliability

These ARP fasteners are built to deliver consistent performance under demanding conditions. The high tensile strength and superior material quality mean that they can support increased loads and resist fatigue over time. Whether used in high-performance engines, trailer hitches, or marine equipment, these bolts help ensure your assembly remains secure and safe. Their corrosion-resistant finish further guarantees longevity, even in harsh environments such as saltwater or humid conditions.

Installation & Fitment

The ARP Hex Bolt Kits are designed for straightforward, bolt-on installation. The standard 5/16˝-24 thread size ensures compatibility with many existing components. No special tools or modifications are required, making them suitable for both professional mechanics and DIY enthusiasts. Proper torque specifications should be followed to achieve optimal clamping force and prevent over-tightening. Always verify thread engagement and inspect fasteners periodically for signs of wear or corrosion.

• Easy to install with common hand tools
• No cutting, drilling, or special modifications needed
• Suitable for high-stress automotive, marine, and trailer applications

What's Included

• Complete set of ARP Hex Bolts with flanged hex heads
• All necessary hardware for installation
• Instruction sheet for proper torque and installation guidelines

Ideal For

• Automotive enthusiasts performing engine or chassis assembly
• Marine applications requiring corrosion-resistant fasteners
• Trailer builders and repair professionals
• Any project demanding high-strength, reliable fasteners

Emissions Note

This product is designed for off-road, racing, or recreational use only and may not be legal for use on public roads in all jurisdictions. Please verify local regulations before installation.