ARP Hex Bolt Kits

3/8˝-16 SAE Bolt Kit by ARP

Part #: 651-1250

Overview

The ARP Hex Bolt Kits are premium-quality fasteners designed for automotive, marine, and trailer applications where strength, durability, and reliability are paramount. Crafted by ARP, a recognized leader in high-performance fasteners, these bolt kits are ideal for enthusiasts and professionals seeking to ensure their projects meet the highest standards of safety and performance. Whether you're assembling engine components, securing chassis parts, or performing custom modifications, these bolts provide the peace of mind that comes with superior materials and engineering.

Built for demanding environments, the ARP Hex Bolt Kits deliver exceptional tensile strength and corrosion resistance, making them suitable for both street and off-road use. Their robust construction helps support increased loads and stresses, ensuring your vehicle or equipment maintains integrity under challenging conditions. With ARP's reputation for quality, you can trust these fasteners to perform reliably over the long haul, supporting your vehicle's performance and safety.

Key Features

Designed with precision and durability in mind, the ARP Hex Bolt Kits feature several key technical attributes that set them apart:

• Material: Made from heat-treated 8740 chromoly steel, these bolts offer superior strength and toughness compared to standard steel fasteners.
• Finish: Coated with a black oxide finish, these bolts provide excellent corrosion resistance and a sleek, professional appearance.
• Strength Rating: Rated at 180,000 psi tensile strength, these fasteners offer a substantial safety margin over traditional Grade 8 hardware, making them suitable for high-stress applications.
• Thread Size & Style: The kit includes 3/8˝-16 SAE bolts with flanged hex heads, designed for easy installation and secure fastening.
• Dimensions: Each bolt features a 1.250-inch underhead length, ensuring proper engagement and clamping force.
• Versatility: These fasteners are compatible with a wide range of automotive and industrial applications, including engine assembly, suspension, and chassis modifications.
• Heat Treatment: The specially heat-treated chromoly construction enhances tensile strength and fatigue resistance, ensuring long-lasting performance even under extreme conditions.
• Quality Assurance: ARP's manufacturing process includes rigorous quality control, ensuring each bolt meets strict standards for dimensional accuracy and mechanical properties.

Construction & Design

The ARP Hex Bolt Kits are engineered with precision-machined flanged hex heads that facilitate easy tightening and removal using standard tools. The use of 8740 chromoly steel, a high-strength alloy known for its toughness and fatigue resistance, ensures these bolts can withstand high loads and vibrations typical in automotive and marine environments. The black oxide finish not only enhances corrosion resistance but also provides a professional, finished look suitable for visible applications.

The bolts are designed with a nominal thread size of 5/16 in.-18, making them compatible with a variety of standard fastener applications. Their underhead length of 1.250 inches ensures proper engagement without protruding excessively, maintaining a clean and functional installation. The heat treatment process optimizes the mechanical properties, providing a reliable margin of safety for critical fastenings.

Installation & Fitment

The ARP Hex Bolt Kits are designed for straightforward installation. They utilize standard SAE threading and flanged hex heads, allowing for easy hand or power tool installation. No special tools or modifications are required, making them suitable for both professional mechanics and DIY enthusiasts. Proper torque specifications should be followed as per ARP guidelines or your specific application to ensure optimal clamping force and safety. These bolts are compatible with most standard 5/16 in.-18 threaded holes, making them versatile for a wide range of projects.

• Easy bolt-on installation with standard tools
• No cutting, drilling, or special modifications required
• Suitable for automotive, marine, and trailer applications

What's Included

• Complete set of ARP Hex Bolts (quantity as specified in the kit)
• All necessary hardware for installation
• Instruction sheet for proper torque and installation tips

Ideal For

• Automotive enthusiasts performing engine or chassis assembly
• Marine applications requiring corrosion-resistant fasteners
• Trailer builders and repair professionals
• High-performance and racing vehicle builds