ARP Hex Bolt Kits

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

Part #: 740-1000

Overview

The ARP Hex Bolt Kits are premium-quality fasteners designed to meet the demanding needs of automotive enthusiasts, marine professionals, and trailer builders. Crafted from high-strength materials and engineered for durability, these bolts provide a reliable solution for securing critical components in a variety of applications. Whether you're assembling engine parts, mounting accessories, or performing custom modifications, ARP's hex bolt kits ensure a secure fit with superior strength and corrosion resistance.

Ideal for those seeking to upgrade from standard hardware, these bolts are engineered to deliver consistent performance under high-stress conditions. Their robust construction and heat treatment make them suitable for both daily driving and high-performance scenarios, providing peace of mind that your assemblies will withstand the rigors of demanding environments.

Key Features

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

• Manufactured from 8740 chromoly steel, these bolts offer exceptional tensile strength and toughness, rated at 180,000 psi, providing a significant safety margin over typical Grade 8 hardware.
• The black oxide finish not only enhances corrosion resistance but also gives the bolts a sleek, professional appearance suitable for visible engine bays and custom builds.
• Designed with a flanged 12-point head, these bolts facilitate easy installation and removal with standard tools, ensuring a secure grip and reducing the risk of stripping or rounding.
• The 1.000-inch underhead length provides ample thread engagement for a variety of applications, ensuring a strong, reliable connection.
• Perfectly suited for use in high-stress environments such as engine assemblies, suspension components, and structural mounting points.
• Precision heat-treated to maintain strength and durability over time, even under repeated thermal cycling and mechanical loads.
• Compatible with a wide range of automotive and industrial applications, making them versatile for custom projects and repairs alike.
• Meets or exceeds industry standards for quality and performance, ensuring your project benefits from trusted ARP engineering.

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 excellent toughness. The heat treatment process enhances the tensile strength to 180,000 psi, ensuring these fasteners can handle high loads and stress without failure. The black oxide coating provides a corrosion-resistant barrier, extending the lifespan of the bolts in harsh environments.

The flanged 12-point head design allows for increased torque application and easier access in tight spaces. The 1-inch underhead length ensures sufficient thread engagement, promoting secure fastening and reducing the risk of loosening over time. These bolts are precision-machined to tight tolerances, ensuring a perfect fit and reliable performance in critical applications.

Performance & Reliability

Designed for high-performance and heavy-duty use, these bolts provide a substantial safety margin over standard hardware, making them suitable for critical engine components, suspension systems, and structural mounts. Their high tensile strength ensures they can withstand the stresses of spirited driving, off-road adventures, or marine environments.

Whether you're building a race engine, restoring a classic, or performing routine maintenance, ARP's hex bolt kits deliver consistent, reliable fastening power. Their durability and corrosion resistance help maintain the integrity of your assemblies over time, reducing the need for frequent replacements and ensuring long-term peace of mind.

Installation & Fitment

The ARP Hex Bolt Kits are designed for straightforward, bolt-on installation. They utilize standard 1/4-inch-28 SAE threads, compatible with a wide range of components and applications. No special tools or modifications are required for installation, making them suitable for both professional mechanics and DIY enthusiasts.

Ensure proper torque specifications are followed during installation to maximize the fasteners' performance and longevity. The high-quality materials and precise manufacturing process guarantee a secure fit and reliable operation in your vehicle or project.

What's Included

• Complete set of ARP 1/4˝-28 SAE hex bolts made from 8740 chromoly steel
• Black oxide finish for corrosion resistance and aesthetic appeal
• All hardware necessary for installation (clamps, nuts, washers if applicable)

Ideal For

• Automotive engine assembly and modification
• Marine applications requiring high-strength fasteners
• Trailer construction and repair
• Custom fabrication projects
• Any application demanding durable, high-tensile fasteners