ARP Hex Bolt Kits

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

Part #: 654-3500

Overview

The ARP Hex Bolt Kits are high-quality fasteners designed for enthusiasts and professionals who demand superior strength and durability in their automotive, boat, or trailer projects. Crafted from premium chromoly steel and heat-treated for enhanced performance, these bolts provide a reliable solution for securing critical components with confidence. Whether you're assembling a race car, restoring a classic, or performing heavy-duty repairs, these ARP bolts ensure a secure fit and long-lasting performance.

Ideal for applications where strength, safety, and precision are paramount, these bolts help support increased load capacity and resistance to fatigue. Their black oxide finish not only adds corrosion resistance but also provides a sleek, professional appearance. With a tensile strength rated at 180,000 psi, ARP's fasteners offer a significant safety margin over standard Grade 8 hardware, making them suitable for demanding environments and high-stress applications.

Key Features

ARP Hex Bolt Kits are engineered with the following features to meet the needs of performance-minded users:

• Manufactured from premium 8740 chromoly steel, known for its exceptional strength-to-weight ratio and toughness.
• Heat-treated to a high tensile strength of 180,000 psi, providing a substantial safety margin over standard hardware.
• Black oxide finish offers excellent corrosion resistance and a professional appearance suitable for both street and race applications.
• Designed with a flanged hex head for easy installation and removal using standard tools, ensuring a secure grip and proper torque application.
• Nominal thread size of 3/8 in.-16, compatible with a wide range of automotive and marine components.
• Underhead length of 3.500 inches, providing ample thread engagement for secure fastening in various assemblies.
• Versatile fastener suitable for use on cars, boats, trailers, and other heavy-duty equipment requiring high-strength bolts.
• Precision manufacturing ensures consistent quality and fitment, reducing the risk of stripping or failure during operation.
• Designed for applications where safety, reliability, and performance are critical, including racing, off-road, and restoration projects.

Construction & Design

The ARP Hex Bolt Kits are constructed from 8740 chromoly steel, a material renowned for its exceptional toughness and durability. The bolts undergo a proprietary heat-treatment process that significantly enhances their tensile strength, ensuring they can withstand high loads and harsh conditions. The black oxide finish not only provides corrosion resistance but also minimizes glare and adds a sleek appearance suitable for show or performance applications.

The flanged hex head design allows for easy installation and ensures a secure grip with standard wrenches or sockets. The 3/8˝-16 thread size is a common standard, making these bolts compatible with a wide range of automotive and marine components. The 3.500-inch underhead length offers sufficient engagement depth to ensure reliable fastening in various assemblies, whether in engine bays, chassis, or trailer hitches.

Performance & Reliability

These ARP fasteners are engineered to provide a substantial safety margin and long-term reliability. Their high tensile strength helps support increased torque loads and reduces the risk of bolt failure under stress. The heat-treated chromoly construction ensures consistent performance even in demanding environments, such as high-performance engines or marine conditions. Whether used in street applications, off-road adventures, or racing, these bolts deliver peace of mind and dependable performance.

Installation & Fitment

Installing the ARP Hex Bolt Kits is straightforward and requires no special tools beyond standard wrenches or sockets. The bolts are designed to thread easily into compatible components, and proper torque specifications should be followed to ensure optimal clamping force and safety. No additional modifications or special procedures are necessary, making these bolts a convenient upgrade or replacement for OEM hardware.

• Simply thread into existing holes and tighten to manufacturer-recommended torque values.
• Suitable for use in a variety of automotive, marine, and trailer applications requiring 3/8˝-16 fasteners.

What's Included

• Complete set of ARP Hex Bolts with flanged hex heads
• High-strength chromoly construction for maximum durability
• Black oxide finish for corrosion resistance and aesthetic appeal

Ideal For

• Performance automotive builds and restorations
• Marine applications requiring high-strength fasteners
• Trailer and heavy-duty equipment assembly
• Enthusiasts seeking reliable, safety-rated hardware for demanding environments

Emissions Note

This product is designed for use in off-road, racing, or recreational applications and may not be legal for use on public roads in all jurisdictions. Please verify local regulations before installation.