ARP Hex Bolt Kits

2010–2025 Subaru Forester / Subaru Outback 5/16˝-18 SAE Bolt Kit

Part #: 641-2000

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 specially heat-treated 8740 chromoly steel, these bolts offer exceptional durability and tensile strength, making them an excellent choice for enthusiasts and professionals seeking to upgrade or replace factory hardware. Whether you're working on your daily driver, a performance build, or a restoration project, these ARP bolts deliver peace of mind with their superior construction and safety margins.

Ideal for those who demand the best in quality and performance, the ARP Hex Bolt Kits are engineered to withstand demanding conditions while maintaining precise fitment. Their black oxide finish not only enhances corrosion resistance but also provides a sleek, professional appearance in your engine bay or mechanical assembly. With a nominal tensile strength of 180,000 psi, these fasteners significantly exceed the strength of standard Grade 8 hardware, supporting increased safety and reliability in your vehicle or equipment.

Key Features

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

• Manufactured from heat-treated 8740 chromoly steel for maximum strength and toughness.
• Black oxide finish provides corrosion resistance and a professional look.
• Nominal tensile strength of 180,000 psi offers a substantial safety margin over standard hardware.
• Available in a wide range of thread sizes, head styles, and configurations to suit various applications.
• Precision-machined to ensure proper fitment and ease of installation.
• Designed for use in automotive, boat, trailer, and industrial applications where high-strength fasteners are required.
• Heat-treated for consistent hardness and performance, ensuring long-lasting reliability.
• Manufactured by ARP, a trusted name in high-performance fasteners for over 30 years.

Construction & Design

The ARP Hex Bolt Kits feature a robust construction utilizing 8740 chromoly steel, a material renowned for its excellent strength-to-weight ratio and toughness. Each bolt is carefully heat-treated to achieve a tensile strength of 180,000 psi, ensuring they can handle high-stress environments without failure. The black oxide finish not only enhances corrosion resistance but also reduces glare and provides a sleek appearance suitable for both performance and restoration projects. The precision machining of the hex heads and threads guarantees proper engagement and torque accuracy, facilitating straightforward installation and removal.

Installation & Fitment

The ARP Hex Bolt Kits are designed for easy, bolt-on installation. They utilize standard SAE 5/16˝-18 threads compatible with a wide range of applications. No special tools beyond standard wrenches are required, and the precise machining ensures proper fitment without the need for modifications. These bolts are suitable for use in various automotive and industrial assemblies, including engine components, brackets, and mounting hardware. Always torque to manufacturer specifications or ARP recommended settings to ensure optimal performance and safety.

• Easy, bolt-on installation with standard tools
• No cutting, drilling, or special modifications required
• Suitable for automotive, marine, and trailer applications

What's Included

• Complete set of ARP Hex Bolts in the specified thread size and length
• All necessary hardware for installation
• Instruction sheet for proper torque and installation guidelines

Ideal For

• Performance enthusiasts seeking high-strength fasteners
• Restoration projects requiring reliable hardware
• Marine and trailer applications demanding corrosion-resistant fasteners
• Engine builders and mechanics needing durable, safety-rated bolts