ARP Hex Bolt Kits

5/16˝-18 SAE Bolt Kit for Automotive, Marine, and Trailer Applications

Part #: 651-0750

Overview

The ARP Hex Bolt Kits are high-quality fasteners designed to provide superior strength and durability for a wide range of automotive, marine, and trailer applications. Crafted from premium chromoly steel and featuring a black oxide finish, these bolts are engineered to withstand demanding conditions and deliver reliable performance. Whether you're assembling engine components, securing trailer parts, or performing custom modifications, these bolts offer a trusted solution for enthusiasts and professionals alike.

Designed with safety and strength in mind, ARP's fasteners are rated at an impressive 180,000 psi tensile strength, offering a significant safety margin over standard Grade 8 hardware. This makes them ideal for applications where high strength and reliability are critical, ensuring your projects maintain integrity under stress and vibration. The flanged hex head design allows for easy installation and removal with standard tools, while the heat-treated chromoly construction ensures longevity and resistance to wear and fatigue.

Key Features

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

• Premium Material: Made from 8740 chromoly steel, these bolts provide exceptional strength and toughness, making them suitable for high-stress applications.
• Heat Treatment: Carefully heat-treated to optimize tensile strength and fatigue resistance, ensuring long-lasting performance even in harsh environments.
• Black Oxide Finish: The durable black oxide coating offers corrosion resistance and a sleek, professional appearance.
• High Tensile Strength: Rated at 180,000 psi, these bolts provide a substantial safety margin over standard hardware, ideal for demanding automotive and marine use.
• Flanged Hex Head: Designed for easy installation and torque application with standard wrenches or sockets, reducing installation time and effort.
• Versatile Compatibility: Suitable for a wide range of applications including engine assembly, chassis modifications, trailer construction, and more.
• Precision Manufacturing: Manufactured to strict quality standards to ensure consistent dimensions and reliable performance.
• Nominal Size: 5/16 inch diameter with 18 threads per inch, compatible with standard SAE fittings and fastener specifications.
• Underhead Length: 0.750 inches, providing ample grip length for secure fastening in various assemblies.

Construction & Design

The ARP Hex Bolt Kits are constructed from 8740 chromoly steel, a material renowned for its high strength-to-weight ratio and excellent toughness. The bolts undergo a precise heat-treatment process that enhances their tensile strength and fatigue life, making them suitable for high-performance and heavy-duty applications. The black oxide finish not only adds corrosion resistance but also provides a professional, finished appearance that resists rust and staining.

The flanged hex head design allows for even distribution of load and reduces the risk of head stripping during installation. The 5/16˝-18 thread size is a common standard, ensuring compatibility with many existing components and fastener systems. The underhead length of 0.750 inches offers sufficient engagement depth for secure fastening, whether used in engine assemblies, chassis components, or trailer hardware.

Performance & Reliability

These ARP fasteners are engineered to provide a reliable, high-strength fastening solution that supports your vehicle's performance and safety. Their superior tensile strength ensures they can handle the stresses of spirited driving, off-road adventures, or heavy loads. The durable construction and corrosion-resistant finish help maintain their integrity over time, even in challenging environments.

Installation & Fitment

The ARP Hex Bolt Kits are designed for straightforward, bolt-on installation. They utilize standard SAE threading and head styles, making them compatible with existing hardware and tools. No special modifications or tuning are required to install these bolts, making them an excellent choice for both professional mechanics and DIY enthusiasts. Simply torque to the manufacturer’s specifications to ensure optimal clamping force and safety.

• Easy to install with standard tools
• No cutting, drilling, or special modifications needed
• Suitable for a wide range of automotive, marine, and trailer applications

What's Included

• Complete set of ARP Hex Bolts, 5/16˝-18 x 0.750 inches
• High-quality hardware designed for durability and performance
• Instruction sheet for proper installation and torque specifications

Ideal For

• Automotive enthusiasts performing engine or chassis modifications
• Marine applications requiring corrosion-resistant fasteners
• Trailer builders seeking high-strength hardware for secure assembly
• Professionals and DIYers needing reliable, heavy-duty fasteners for demanding projects

Emissions Note

This product is designed for use in non-emissions-critical applications. Please verify local regulations before use in any emissions-controlled environment.