ARP Hex Bolt Kits

2010–2025 Universal Fitment for Automotive, Marine, and Trailer Applications

Part #: 650-1000

Overview

The ARP Hex Bolt Kits are premium-quality fasteners designed to provide strength, durability, and reliability for a wide range of automotive, marine, and trailer applications. Crafted from high-grade chromoly steel and heat-treated for maximum strength, these bolts are ideal for enthusiasts and professionals seeking to upgrade or replace factory hardware with components that can withstand demanding conditions.

Whether you're working on engine assemblies, suspension components, or trailer connections, these ARP bolts offer a significant safety margin and peace of mind. Their black oxide finish not only enhances corrosion resistance but also provides a sleek, professional appearance in your engine bay or equipment setup. Designed for those who demand the best in quality and performance, these fasteners help ensure your project maintains integrity under stress and high temperatures.

Key Features

ARP Hex Bolt Kits are engineered with precision and attention to detail to meet or exceed OEM standards. The fasteners feature a flanged hex head for easy installation and removal with standard tools, while the 1/4˝-20 thread size makes them versatile for various applications. The 1.000-inch underhead length provides adequate grip and clamping force, ensuring secure fastening in tight spaces.

• Manufactured from 8740 chromoly steel, known for its exceptional strength and toughness
• Heat-treated to 180,000 psi tensile strength, offering a substantial safety margin over Grade 8 hardware
• Black oxide finish provides corrosion resistance and a professional appearance
• Flanged hex head design for easy installation and removal with standard wrenches
• Ideal for high-stress automotive, marine, and trailer applications
• Suitable for use in engine assemblies, suspension components, and structural connections
• Precision-machined threads ensure proper fit and torque accuracy
• Meets or exceeds industry standards for fastener quality and performance

Construction & Design

The ARP Hex Bolt Kits are constructed from 8740 chromoly steel, a material renowned for its high strength-to-weight ratio and durability. Each bolt undergoes a proprietary heat-treating process that enhances tensile strength to 180,000 psi, ensuring they can handle extreme loads and stresses. The black oxide finish not only provides corrosion resistance but also reduces glare and adds a professional look to your assembly.

The flanged hex head design allows for secure tightening and loosening using standard tools, while the precise machining of the threads guarantees a smooth, accurate fit. These features combine to deliver a fastener that is both reliable and easy to work with, making them suitable for high-performance and heavy-duty applications.

Installation & Fitment

Installing the ARP Hex Bolt Kits is straightforward, thanks to their standard 1/4˝-20 thread size and flanged hex head. These bolts are designed to be a direct replacement for OEM hardware in compatible applications. No special tools or modifications are required, and proper torque specifications should be followed to ensure optimal clamping force and safety.

• Easy bolt-on installation with common hand tools
• No cutting, drilling, or special modifications needed
• Suitable for use in a variety of automotive, marine, and trailer assemblies

What's Included

• Complete set of ARP Hex Bolts with flanged hex heads
• High-quality chromoly construction for maximum strength
• Black oxide finish for corrosion resistance
• Installation instructions (if applicable)

Ideal For

• Automotive enthusiasts upgrading engine or suspension hardware
• Marine applications requiring durable, corrosion-resistant fasteners
• Trailer builders and repair professionals seeking reliable hardware
• High-stress structural connections in various mechanical setups