ARP Hex Bolt Kits

2010–2025 Universal Fit for Automotive Applications

Part #: 400-8605

Overview

The ARP Hex Bolt Kits are precision-engineered fasteners designed for high-performance automotive applications. Crafted from aerospace-quality materials, these hex nuts provide exceptional strength and durability, making them ideal for enthusiasts and professionals who demand reliability under extreme conditions. Whether you're assembling engine components, suspension parts, or custom builds, these bolts ensure a secure fit and long-lasting performance.

If you're looking to upgrade your vehicle's hardware with top-tier fasteners, the ARP Hex Bolt Kits deliver consistent quality and peace of mind. Their robust construction helps support increased horsepower and torque, while their polished finish adds a sleek, professional look to your engine bay or chassis. Designed for both street and racing use, these nuts are a trusted choice for those who prioritize strength and precision in their builds.

Key Features

ARP Hex Bolt Kits are built with the highest standards of quality and engineering, offering several key benefits:

• Material Excellence: Made from aerospace-grade stainless steel, these nuts provide superior corrosion resistance and strength, ensuring longevity even in harsh environments.
• Exceptional Tensile Strength: Rated at 180,000 psi, these fasteners can withstand extreme loads, making them suitable for high-stress applications such as engine assembly and chassis reinforcement.
• Precision Machining: The hex-style heads are machined for a perfect fit with standard wrenches, allowing for easy installation and removal.
• Polished Finish: The polished surface not only enhances appearance but also provides an additional layer of corrosion resistance.
• Versatile Sizes: Available in various sizes, ARP offers a comprehensive range to meet nearly all your fastening needs across different vehicle models and components.
• Reliable Performance: Designed to meet or exceed OEM standards, these nuts help support your vehicle's performance and safety.
• Non-Nylon & Non-Locking: These nuts are designed for secure fastening without nylon inserts or self-locking features, suitable for applications where reusability and high strength are required.

Construction & Design

The ARP Hex Bolt Kits feature a robust construction utilizing aerospace-quality stainless steel, which provides an excellent balance of strength, corrosion resistance, and durability. The hex heads are precisely machined to ensure a snug fit with standard tools, reducing the risk of stripping or rounding during installation. The polished finish not only adds aesthetic appeal but also helps prevent rust and corrosion, especially in exposed or off-road environments.

These fasteners are designed with a 7/16˝-20 thread size, a common specification in many high-performance and OEM applications. Their high tensile strength rating of 180,000 psi ensures they can handle demanding loads, making them suitable for critical components that require secure fastening under extreme conditions. The absence of nylon inserts or self-locking features means they can be reused multiple times without losing their integrity, provided they are properly maintained.

Installation & Fitment

Installing the ARP Hex Bolt Kits is straightforward, thanks to their standard hex head design and precise threading. These nuts are designed to fit standard 7/16˝-20 threaded applications, making them compatible with a wide range of automotive components. No special tools or modifications are required for installation, and they can be easily torqued to manufacturer specifications. Their high-quality construction ensures a secure, reliable fit every time, whether you're assembling engine parts, mounting brackets, or other critical components.

• Easy bolt-on installation with standard wrenches
• No cutting, drilling, or special tuning needed
• Suitable for high-stress and high-performance applications

What's Included

• Complete set of ARP Hex Nuts in the specified size and material
• All necessary hardware for installation
• Instruction sheet for proper torque specifications and installation tips

Ideal For

• High-performance engine builds
• Race cars and track vehicles
• Off-road vehicles exposed to harsh conditions
• Restoration projects requiring OEM-grade fasteners
• Enthusiasts seeking durable, reusable hardware