ARP Hex Bolt Kits

1/4˝-28 SAE Bolt Kit for Automotive, Marine, and Trailer Applications

Part #: 740-1500

Overview

The ARP Hex Bolt Kits are high-performance fasteners designed to meet the demanding needs of automotive enthusiasts, marine applications, and trailer builders. Crafted from premium-quality chromoly steel, these bolts deliver exceptional strength, durability, and reliability. Whether you're assembling a race engine, securing trailer components, or performing custom modifications, these bolts provide a trusted solution to ensure your project holds together under stress.

Ideal for those seeking a combination of strength and precision, ARP's hex bolt kits are engineered to support increased safety margins and long-lasting performance. Their heat-treated construction and black oxide finish not only enhance corrosion resistance but also give a sleek, professional appearance to your build. With a tensile strength rated at 180,000 psi, these fasteners surpass standard Grade 8 hardware, offering peace of mind in high-stress environments.

Key Features

ARP Hex Bolt Kits incorporate several advanced features that set them apart from standard fasteners:

• Premium Material: Made from 8740 chromoly steel, known for its exceptional toughness and strength, ensuring reliable performance even under extreme conditions.
• Heat Treatment: Carefully heat-treated to achieve a tensile strength of 180,000 psi, providing a significant safety margin for critical applications.
• Design & Finish: Features a black oxide finish that offers corrosion resistance and a professional appearance, suitable for both performance and restoration projects.
• Fastener Type & Size: 1/4˝-28 SAE bolt with a flanged 12-point head, designed for easy installation and removal with standard tools.
• Underhead Length: 1.500 inches, optimized for a variety of mounting and assembly needs.
• Versatility: Suitable for use on cars, boats, trailers, and other machinery requiring high-strength fasteners.
• Reliability: Engineered to provide a substantial margin of safety over conventional hardware, reducing the risk of failure during demanding use.
• Application Flexibility: Compatible with a wide range of fastener configurations, making it a versatile choice for custom builds and repairs.

Construction & Design

The ARP Hex Bolt Kits are meticulously manufactured from 8740 chromoly steel, a material renowned for its high strength-to-weight ratio and toughness. The bolts undergo a precise heat-treating process to achieve their impressive 180,000 psi tensile strength, ensuring they can withstand high loads and vibrations. The black oxide finish not only enhances corrosion resistance but also provides a sleek, professional look that complements performance builds.

The flanged 12-point head design allows for increased torque application and easier access in tight spaces, reducing the risk of stripping or rounding off the fastener. The 1.500-inch underhead length offers versatility for various mounting depths and configurations. These features combine to create a fastener that is both durable and user-friendly, suitable for demanding automotive and industrial applications.

Performance & Reliability

Designed for high-stress environments, these ARP bolts deliver consistent performance and peace of mind. Their superior tensile strength ensures they can support increased loads and torque settings, making them ideal for performance upgrades, racing, or heavy-duty use. The heat-treated chromoly construction provides excellent fatigue resistance, while the black oxide finish guards against rust and corrosion, extending the lifespan of the fasteners in harsh conditions.

Installation & Fitment

Installing the ARP Hex Bolt Kits is straightforward, thanks to their standard SAE thread size and flanged 12-point head. They are designed to fit standard 1/4˝-28 threaded holes, making them compatible with a wide range of components and assemblies. No special tools or modifications are required for installation. These bolts are intended for bolted connections where high strength and reliability are critical, and they can be used in both professional and DIY settings.

• Easy to install with common hand tools
• No cutting, drilling, or special tuning required
• Suitable for a variety of automotive, marine, and trailer applications

What's Included

• Complete set of ARP Hex Bolts (quantity as specified by the kit)
• Hardware designed for high-performance and durability
• Instructions for proper installation and torque specifications

Ideal For

• Automotive enthusiasts performing engine builds or modifications
• Marine applications requiring corrosion-resistant fasteners
• Trailer assembly and repair for added safety and strength
• Custom fabrication projects demanding high-quality hardware

Emissions Note

This product is designed for use in applications where high-strength fasteners are required. It is not specifically certified for emissions compliance and is intended for off-road, racing, or industrial use only. Please verify local regulations before installation in street-driven vehicles.