ARP Hex Bolt Kits

2010–2025 Universal Fitment for Automotive, Marine, and Trailer Applications

Part #: 664-1008

Overview

The ARP Hex Bolt Kits are premium-quality fasteners designed to provide reliable, high-strength fastening solutions for a wide range of automotive, marine, and trailer applications. Crafted from heat-treated 8740 chromoly steel, these bolts are engineered to withstand demanding conditions while maintaining exceptional durability and safety margins. Whether you're performing engine modifications, chassis work, or trailer assembly, these bolts offer a robust and dependable fastening option.

Ideal for enthusiasts and professionals alike, the ARP Hex Bolt Kits deliver peace of mind with their superior tensile strength and corrosion-resistant finish. Their flanged hex head design ensures easy installation and secure torque application, making them suitable for both repair and performance upgrades. With their versatile M12 x 1.50 thread size and precise dimensions, these bolts are compatible with a variety of components requiring high-strength fasteners.

Key Features

Designed with performance and reliability in mind, the ARP Hex Bolt Kits feature several key attributes:

• High-Strength Material: Made from 8740 chromoly steel, these bolts are heat-treated to achieve a tensile strength of 180,000 psi, providing a significant safety margin over standard Grade 8 hardware.
• Corrosion Resistance: The black oxide finish offers excellent corrosion resistance, ensuring longevity and maintaining appearance even in harsh environments.
• Precision Manufacturing: Manufactured with tight tolerances and high-quality standards, these bolts ensure proper fitment and consistent performance.
• Flanged Hex Head: The flanged head design distributes load evenly and provides a secure grip during tightening, reducing the risk of stripping or loosening.
• Versatile Application: Suitable for use in automotive engines, chassis, trailers, boats, and other machinery requiring durable, high-tensile fasteners.
• Easy Installation: The standard hex head allows for straightforward tightening with common tools, facilitating quick and efficient assembly or repair.
• Heat-Treated for Strength: The specially heat-treated 8740 chromoly steel enhances the bolt's strength and durability under stress.
• Nominal Thread Size: M12 x 1.50, compatible with a wide range of components and assemblies.

Construction & Design

The ARP Hex Bolt Kits are meticulously manufactured from 8740 chromoly steel, a material renowned for its exceptional strength-to-weight ratio and toughness. The bolts undergo a precise heat-treating process to achieve a tensile strength of 180,000 psi, ensuring they can handle high-stress applications without failure. The black oxide finish not only provides corrosion resistance but also reduces glare and enhances the aesthetic appeal of the fasteners.

The flanged hex head design is engineered for optimal load distribution and ease of installation. The dimensions, including a 70mm underhead length, are carefully specified to fit a variety of applications, providing a secure and reliable fastening solution. These bolts are manufactured with strict quality control standards, ensuring consistent performance and fitment across every kit.

Performance & Reliability

Built for demanding environments, the ARP Hex Bolt Kits deliver dependable performance in automotive, marine, and trailer applications. Their high tensile strength ensures they can support critical components and assemblies, reducing the risk of failure under stress. The corrosion-resistant finish extends service life, even in exposure to moisture, salt, or harsh conditions. Whether used in high-performance engines or structural assemblies, these bolts help maintain safety and integrity.

Installation & Fitment

The ARP Hex Bolt Kits are designed for straightforward, bolt-on installation. The standard hex head allows for easy tightening with common tools such as wrenches or sockets. No special modifications or tools are required, making them suitable for both professional mechanics and DIY enthusiasts. The precise thread pitch and dimensions ensure proper fitment and torque application, supporting optimal clamping force and safety.

• Compatible with a wide range of automotive, marine, and trailer components
• No cutting, drilling, or special tuning required for installation

What's Included

• Complete set of high-strength M12 x 1.50 chromoly bolts with flanged hex heads
• All necessary hardware for installation
• Instruction manual (if applicable)

Ideal For

• Automotive enthusiasts performing engine or chassis modifications
• Marine applications requiring corrosion-resistant fasteners
• Trailer assembly and repair
• High-stress mechanical assemblies in demanding environments