ARP 12pt Hardware Kit

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

Part #: 664-1005

Overview

The ARP 12pt Hardware Kit is a premium fastener solution designed for automotive enthusiasts, builders, and professionals who demand the highest quality hardware for their projects. Whether you're assembling a high-performance engine, restoring a classic car, or securing components on a trailer or boat, these ARP chromoly bolts provide unmatched strength and durability. Engineered with precision and built to withstand demanding conditions, this hardware kit ensures your installation is secure, reliable, and long-lasting.

Ideal for those who prioritize safety and performance, the ARP 12pt Hardware Kit offers a significant upgrade over standard hardware. Its high tensile strength and heat-treated construction make it suitable for a wide range of applications, from daily drivers to race cars and off-road vehicles. With ARP's reputation for quality and innovation, you can trust these fasteners to deliver consistent performance and peace of mind.

Key Features

The ARP 12pt Hardware Kit boasts several technical features that set it apart from conventional fasteners:

• Constructed from specially heat-treated 8740 chromoly steel, providing exceptional strength and toughness for demanding applications.
• Nominally rated at 180,000 psi tensile strength, offering a substantial safety margin over standard Grade 8 hardware.
• Black oxide finish enhances corrosion resistance and provides a sleek, professional appearance.
• Designed with a 12-point (12pt) head configuration for improved wrench engagement, allowing for easier installation and removal in tight spaces.
• Available in a wide range of thread sizes, head styles, and options to suit various project needs.
• Precision-machined to strict tolerances, ensuring proper fitment and reliable torque application.
• Versatile use across automotive, marine, trailer, and industrial applications where high-strength fasteners are required.
• Manufactured by ARP, a trusted leader in high-performance fasteners with decades of experience in racing and OEM markets.

Construction & Design

The ARP 12pt Hardware Kit features a robust design utilizing 8740 chromoly steel, a material renowned for its strength-to-weight ratio and durability. Each fastener is carefully heat-treated to achieve a tensile strength of 180,000 psi, ensuring it can withstand high loads and stresses encountered during spirited driving, racing, or heavy-duty use. The black oxide coating not only provides corrosion resistance but also reduces glare and adds a professional finish.

The 12-point head design allows for better wrench engagement, especially in tight or hard-to-reach areas, reducing the risk of stripping or rounding off the fastener head. The precision machining ensures a proper fit and consistent torque application, which is critical for maintaining the integrity of your assembly. Whether used in engine components, suspension parts, or trailer hardware, these bolts are engineered for reliability and longevity.

Performance & Reliability

With a tensile strength rating of 180,000 psi, the ARP 12pt Hardware Kit provides a significant safety margin and peace of mind for high-performance applications. Its superior material quality and heat treatment process mean these fasteners can handle extreme conditions, including high temperatures and vibration. This makes them an excellent choice for performance builds, off-road adventures, or any scenario where hardware failure could compromise safety or performance.

While designed primarily for strength and durability, these bolts also contribute to a clean, professional engine bay or assembly. Their high-quality finish and precise manufacturing ensure they look as good as they perform, making them a favorite among builders and restorers who value both function and appearance.

Installation & Fitment

The ARP 12pt Hardware Kit is designed for easy, straightforward installation. Its standard metric M12 x 1.5 thread size fits a wide range of applications, and the 12-point head allows for easier wrench access in confined spaces. No special tools beyond standard metric wrenches are required. These fasteners are compatible with most OEM and aftermarket components that utilize M12 x 1.5 threads.

Because of their high-quality construction and precise machining, these bolts do not require any special preparation or modifications during installation. They are suitable for use in both new assemblies and replacements, providing a secure, long-lasting fastening solution.

What's Included

• Complete set of high-strength M12 x 1.5 chromoly bolts with 12-point heads
• Assorted hardware options available based on specific application needs
• Installation instructions (if applicable)

Ideal For

• Automotive engine assembly and rebuilds
• High-performance and racing applications
• Restoration projects requiring OEM-quality hardware
• Marine and trailer hardware where corrosion resistance is important
• Heavy-duty industrial and off-road use

Emissions Note

This product is designed for use in applications where high strength and durability are required. Please verify compatibility with your local regulations and ensure proper installation. ARP hardware is intended for off-road, racing, or industrial use and may not be legal for street use in all jurisdictions.