ARP Hex Bolt Kits

3/8˝-16 SAE Bolt Kit for Automotive, Marine, and Trailer Applications

Part #: 654-2250

Overview

The ARP Hex Bolt Kits are high-quality fasteners designed to provide reliable, durable, and precise fastening solutions for a wide range of automotive, marine, and trailer applications. Crafted from premium materials and engineered for strength, these bolts are ideal for enthusiasts and professionals seeking to ensure the integrity and safety of their assemblies. Whether you're performing engine rebuilds, chassis modifications, or trailer repairs, these ARP bolts deliver the performance and peace of mind you require.

Constructed with meticulous attention to detail, ARP's hex bolt kits are perfect for those who demand the best in quality and safety. Their heat-treated chromoly construction ensures superior tensile strength, making them suitable for high-stress environments. The black oxide finish not only enhances corrosion resistance but also provides a sleek, professional appearance in your engine bay or equipment setup. These bolts are designed to support demanding applications where safety margins and reliability are paramount.

Key Features

ARP Hex Bolt Kits incorporate several advanced features that set them apart from standard hardware. These include:

• Premium Material: Made from 8740 chromoly steel, known for its exceptional strength and toughness, ensuring long-lasting performance under stress.
• Heat Treatment: Carefully heat-treated to achieve a tensile strength rating of 180,000 psi, providing a significant safety margin over typical Grade 8 hardware.
• Black Oxide Finish: Offers excellent corrosion resistance and a professional appearance, suitable for both indoor and outdoor environments.
• Precision Manufacturing: Manufactured to strict tolerances for consistent fitment and reliable torque application.
• Versatile Application: Suitable for use in automotive engines, marine equipment, trailers, and other machinery requiring 3/8˝-16 fasteners.
• Flanged Hex Head: Designed for easy installation and removal with a flanged head that distributes load evenly and reduces the risk of stripping.
• Underhead Length: 2.250 inches, providing ample engagement and holding power in various assembly configurations.

Construction & Design

The ARP Hex Bolt Kits are engineered with durability and precision in mind. The use of 8740 chromoly steel ensures high tensile strength and toughness, making these bolts suitable for high-stress applications. The heat treatment process enhances their mechanical properties, providing a substantial safety margin over standard hardware. The black oxide finish not only improves corrosion resistance but also reduces glare and adds a sleek appearance to your assembly.

The flanged hex head design allows for easy installation with standard tools, while the 2.250-inch underhead length ensures secure fastening in a variety of applications. These bolts are manufactured to tight tolerances, ensuring consistent quality and reliable torque performance. Whether used in engine components, suspension parts, or trailer assemblies, these ARP bolts are built to withstand demanding conditions and provide long-term reliability.

Installation & Fitment

Installing the ARP Hex Bolt Kits is straightforward and requires standard hand tools. These bolts are designed to thread into existing OEM or aftermarket threaded holes that accept 3/8˝-16 fasteners. No special modifications, cutting, or drilling are necessary, making them a direct replacement for standard hardware in compatible applications. Proper torque specifications should be followed to ensure optimal clamping force and safety. Always consult your vehicle or equipment manufacturer’s guidelines for specific torque values.

• Easy bolt-on installation with common hand tools
• Compatible with standard 3/8˝-16 threaded holes
• No cutting, drilling, or special tuning required

What's Included

• Complete set of ARP 3/8˝-16 flanged hex bolts
• High-quality hardware designed for durability and safety
• Instruction sheet for proper installation

Ideal For

• Automotive enthusiasts performing engine rebuilds or modifications
• Marine applications requiring corrosion-resistant fasteners
• Trailer and equipment assembly and repair
• Professionals seeking high-strength, reliable hardware for demanding environments