ARP Hex Bolt Kits

1/4˝-20 SAE Bolt Kit for Automotive, Marine, and Trailer Applications

Part #: 650-3500

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 tensile strength and durability, making them an ideal choice for enthusiasts and professionals seeking to ensure safety and performance in their projects. Whether you're assembling engine components, securing trailer parts, or performing custom modifications, these ARP bolts deliver peace of mind with their superior material properties and precise manufacturing.

Designed for those who demand the best, these hex bolts are engineered to withstand demanding conditions while maintaining consistent performance. Their black oxide finish not only enhances corrosion resistance but also provides a sleek, professional appearance. With a nominal tensile strength of 180,000 psi, these fasteners offer a significant safety margin over standard Grade 8 hardware, making them suitable for high-stress applications where reliability is critical.

Key Features

ARP Hex Bolt Kits incorporate advanced materials and manufacturing techniques to ensure maximum strength and longevity. The bolts are made from 8740 chromoly steel, a high-grade alloy known for its toughness and fatigue resistance. Heat treatment processes further enhance their mechanical properties, providing a robust fastener capable of handling extreme loads.

• Material: 8740 chromoly steel for superior strength and toughness
• Finish: Black oxide coating for corrosion resistance and a professional look
• Thread Size: 1/4 in.-20, standard SAE thread for compatibility with a wide range of components
• Head Style: Flanged hex head for easy installation and removal with standard tools
• Underhead Length: 3.500 inches, providing ample engagement and holding power
• Rated Tensile Strength: 180,000 psi, offering a substantial safety margin over typical hardware
• Versatility: Suitable for automotive, boat, trailer, and other high-stress fastening needs
• Heat Treatment: Ensures consistent mechanical properties and long-term durability
• Application: Ideal for critical fastenings where strength and safety are paramount

Construction & Design

The ARP Hex Bolt Kits are meticulously engineered with precision-machined flanged hex heads that facilitate easy tightening and loosening using standard wrenches or sockets. The use of 8740 chromoly steel, combined with advanced heat treatment, results in fasteners that resist stretching, fatigue, and corrosion, even in harsh environments. The black oxide finish not only enhances appearance but also provides an additional layer of protection against rust and corrosion, extending the service life of the fasteners.

The 3.500-inch underhead length ensures secure engagement and optimal clamping force, making these bolts suitable for a variety of applications where high strength and reliability are required. Their SAE 1/4˝-20 thread size makes them compatible with many standard components, simplifying installation and replacement processes.

Performance & Reliability

These ARP bolts are designed to deliver consistent, high-performance fastening solutions. Their high tensile strength and durable construction make them suitable for demanding automotive and marine environments. Whether used in engine assemblies, suspension components, or trailer hardware, these fasteners help support increased safety margins and long-term reliability. Their corrosion-resistant finish ensures that they maintain their integrity over time, even when exposed to moisture, salt, or other challenging conditions.

Installation & Fitment

The ARP Hex Bolt Kits are designed for straightforward, bolt-on installation. Their standard 1/4˝-20 SAE thread size and flanged hex head allow for easy tightening with common hand tools. No special modifications or additional hardware are required for most applications. The precise manufacturing tolerances ensure a proper fit and secure fastening every time. These bolts are suitable for use in a variety of automotive, marine, and trailer assemblies where high-strength fasteners are needed.

• Easy to install with standard tools
• No cutting, drilling, or special tuning required
• Compatible with most 1/4˝-20 threaded components

What's Included

• Complete set of ARP Hex Bolts with flanged hex heads
• Black oxide finish for corrosion resistance
• Detailed installation instructions (if provided)

Ideal For

• Automotive enthusiasts performing high-stress modifications
• Marine applications requiring durable, corrosion-resistant fasteners
• Trailer builders and repair professionals
• Any project demanding high-strength, reliable fasteners

Emissions Note

These ARP Hex Bolt Kits are designed for general use and do not carry specific emissions compliance certifications. Always verify application suitability for your specific project or vehicle.