ARP Hex Bolt Kits

3/8˝-16 SAE Bolt Kit for Automotive, Marine, and Trailer Applications

Part #: 654-2500

Overview

The ARP Hex Bolt Kits are premium-quality fasteners designed to provide reliable, high-strength connections for a wide range of automotive, marine, and trailer applications. Crafted from top-grade materials and engineered for durability, these bolts are ideal for enthusiasts and professionals seeking to ensure safety and performance in critical fastening points. Whether you're assembling engine components, securing trailer parts, or performing custom modifications, ARP's hex bolt kits deliver peace of mind with their superior tensile strength and precision manufacturing.

Designed for those who demand the best, these bolts help support increased safety margins and long-term reliability. Their robust construction and heat-treated chromoly material make them suitable for demanding environments, ensuring your projects maintain integrity under stress and vibration. With ARP's reputation for quality and innovation, these fasteners are a trusted choice for both daily drivers and high-performance builds.

Key Features

ARP Hex Bolt Kits are engineered with a focus on strength, durability, and ease of installation. Key features include:

• Manufactured from high-grade 8740 chromoly steel, offering exceptional strength and toughness for demanding applications.
• Heat-treated to a tensile strength of 180,000 psi, providing a significant safety margin over standard Grade 8 hardware.
• Black oxide finish enhances corrosion resistance and provides a sleek, professional appearance.
• Designed with a flanged hex head for easy installation and removal using standard tools, reducing the risk of stripping or rounding off the fastener head.
• Precisely machined to strict tolerances for a perfect fit and consistent performance across every kit.
• Ideal for automotive, marine, and trailer use, supporting a wide range of fastening needs with confidence.
• Available in various sizes; this kit features 3/8˝-16 threads with a 2.500-inch underhead length, suitable for many standard applications.
• Corrosion-resistant finish ensures longevity even in harsh environments, making these bolts suitable for both indoor and outdoor use.
• Designed to meet or exceed industry standards for quality and safety, providing peace of mind during installation and operation.

Construction & Design

The ARP Hex Bolt Kits are constructed from premium chromoly steel, a material renowned for its high strength-to-weight ratio and excellent fatigue resistance. The heat treatment process enhances the tensile properties, ensuring the bolts can withstand high loads and vibrations common in automotive and marine environments. The black oxide coating not only provides a sleek appearance but also offers additional corrosion resistance, making these fasteners suitable for use in challenging conditions.

The flanged hex head design allows for easy tightening and loosening with standard wrenches or sockets, reducing installation time and minimizing the risk of damage. The precise machining ensures a snug fit and consistent performance, critical for maintaining safety and reliability in high-stress applications. These bolts are engineered to meet strict industry standards, ensuring they perform reliably over the long term.

Performance & Safety

With a tensile strength rated at 180,000 psi, these ARP chromoly bolts provide a substantial safety margin over typical Grade 8 hardware, making them suitable for critical fastening points where strength and reliability are paramount. Their high-quality construction helps support increased torque loads and reduces the risk of failure under stress. The black oxide finish adds an extra layer of protection against corrosion, ensuring consistent performance even in marine or outdoor environments.

Installation & Fitment

Designed as a bolt-on solution, the ARP Hex Bolt Kits are straightforward to install using standard hand tools. The precise dimensions and high-quality manufacturing ensure a perfect fit with compatible threaded holes. No special tools or modifications are required for installation, making these fasteners suitable for both professional workshops and DIY enthusiasts. Always verify thread size and length to ensure compatibility with your specific application.

• Easy to install with standard wrenches or sockets
• 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 chromoly hex bolts with flanged heads
• All necessary hardware for installation
• Instruction sheet for proper torque specifications and installation tips

Ideal For

• Automotive enthusiasts performing engine builds or modifications
• Marine applications requiring high-strength fasteners
• Trailer assembly and repair
• Any project demanding reliable, high-tensile fasteners for critical connections

Emissions Note

These ARP Hex Bolt Kits are designed for general use and do not impact emissions systems. They are suitable for use in applications where high-strength fasteners are required, and are compliant with industry standards for safety and durability.