ARP Hex Bolt Kits

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

Part #: 652-1500

Overview

The ARP Hex Bolt Kits are premium-grade fasteners designed for enthusiasts and professionals who demand the highest quality hardware for their automotive, marine, or trailer projects. Crafted from heat-treated chromoly steel, these bolts provide exceptional strength and durability, ensuring reliable performance under demanding conditions. Whether you're assembling a high-performance engine, securing trailer components, or performing custom modifications, these bolts are engineered to meet and exceed industry standards.

Designed for those who prioritize safety, strength, and longevity, ARP's hex bolt kits are an excellent choice for both daily drivers and racing applications. The black oxide finish not only enhances corrosion resistance but also gives a sleek, professional appearance to your hardware. With a tensile strength rated at 180,000 psi, these fasteners offer a significant safety margin over standard Grade 8 hardware, making them suitable for critical load-bearing applications.

Key Features

ARP Hex Bolt Kits are engineered with precision and quality in mind, offering several key features that set them apart:

• Manufactured from high-strength 8740 chromoly steel, providing superior tensile strength and toughness.
• Heat-treated to ensure consistent hardness and durability, capable of withstanding extreme stresses.
• Black oxide finish enhances corrosion resistance and provides a professional, finished look.
• Nominally rated at 180,000 psi tensile strength, offering a substantial safety margin over standard hardware.
• Designed with a flanged hex head for easy installation and removal using standard tools.
• Underhead length of 1.500 inches, suitable for a variety of fastening needs.
• Ideal for use in high-performance engines, chassis, suspension, and trailer assemblies.
• Precision-machined threads ensure proper fitment and torque accuracy.
• Compatible with a wide range of applications requiring 3/8˝-16 SAE bolt specifications.

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 specialized heat-treatment process that enhances their tensile strength to 180,000 psi, ensuring they can handle high-stress environments without failure. The black oxide finish not only provides corrosion resistance but also reduces glare and adds a professional aesthetic.

The flanged hex head design allows for easy installation and removal with standard wrenches or sockets, providing a secure grip and minimizing the risk of stripping. The underhead length of 1.500 inches makes these bolts versatile for various applications, from engine assembly to trailer hitch mounting. Precision-machined threads guarantee a proper fit, enabling accurate torque application and optimal clamping force.

Performance & Reliability

These ARP fasteners are built to deliver consistent performance in demanding conditions. Their high tensile strength ensures that they can support critical loads, reducing the risk of fastener failure during high-stress scenarios such as racing, off-road driving, or heavy-duty towing. The heat-treated chromoly construction provides excellent fatigue resistance, extending the service life of your assembly.

Installation & Fitment

The ARP Hex Bolt Kits are designed for straightforward, bolt-on installation. They use standard 3/8˝-16 SAE threads, compatible with a wide range of components and assemblies. No special tools or modifications are required for installation, making them suitable for both professional mechanics and DIY enthusiasts. Always torque bolts to the manufacturer’s specifications to ensure optimal safety and performance.

• Simply thread the bolts into the corresponding threaded holes and tighten to the recommended torque.
• Ensure proper alignment and clean threads before installation for best results.

These bolts are ideal for high-stress applications where strength and reliability are paramount. Their robust construction makes them suitable for engine builds, suspension components, chassis assembly, and trailer hardware.

What's Included

• Complete set of ARP Hex Bolts with flanged hex heads
• High-quality packaging to prevent damage during shipping
• Installation instructions (if applicable)

Ideal For

• Performance automotive builds
• Marine applications requiring corrosion-resistant fasteners
• Trailer and heavy-duty towing setups
• Engine assembly and repair
• Custom fabrication projects

Emissions Note

These ARP Hex Bolt Kits are designed for use in off-road, racing, or recreational applications. They are not certified for use in emissions-critical environments and may not be legal for street use in all jurisdictions. Always verify local regulations before installation.