ARP Nut Kits

2011–2025 Subaru Forester / Subaru Impreza / Subaru WRX 5/16" - 18 Stainless Steel Nut Kit

Part #: 401-8343

Overview

The ARP Nut Kits are high-quality, aerospace-grade fasteners designed to provide reliable and durable fastening solutions for a wide range of automotive applications. Crafted from premium materials, these nuts are ideal for enthusiasts and professionals seeking performance, strength, and precision in their builds. Whether you're assembling engine components, suspension parts, or custom modifications, ARP nut kits ensure a secure fit that withstands demanding conditions.

Designed for street, spirited driving, and off-road use, these stainless steel nuts offer excellent corrosion resistance and longevity. Their polished finish not only enhances the appearance of your engine bay or chassis but also provides added protection against rust and corrosion, making them suitable for both daily drivers and race vehicles.

Key Features

ARP Nut Kits are engineered with the utmost attention to detail, incorporating features that support your vehicle's performance and reliability:

• Manufactured from aerospace-quality stainless steel, providing exceptional strength and corrosion resistance for long-lasting durability.
• Designed with a 12-point style head, allowing for easier installation and removal in tight spaces, while providing a secure grip with your wrench.
• Rated at an impressive 180,000 psi tensile strength, these nuts are built to withstand high-stress environments and heavy loads.
• Polished finish enhances aesthetic appeal and offers additional corrosion protection, maintaining a sleek look over time.
• Compatible with 5/16" - 18 threaded fasteners, making them versatile for various automotive applications.
• Does not include washers or nylon inserts, providing a clean and simple fastening solution.
• Ideal for use in engine assemblies, suspension components, or any application requiring high-strength nuts.

Construction & Design

These ARP Nut Kits feature a precision-machined, 12-point head design that allows for maximum torque application and ease of installation in confined spaces. Made from aerospace-grade stainless steel, they combine strength with corrosion resistance, ensuring they maintain their integrity even in harsh environments. The polished finish not only adds a professional look but also helps prevent rust and corrosion, extending the lifespan of your fasteners. The nuts are engineered to meet or exceed industry standards, providing confidence in their performance and reliability.

Installation & Fitment

Installing the ARP Nut Kits is straightforward, thanks to their standard 12-point head design that allows for easy wrench engagement. They are intended to be used with compatible 5/16" - 18 threaded fasteners and do not require any special tools beyond standard hand wrenches. No cutting, drilling, or special tuning is necessary, making them a perfect bolt-on upgrade for your vehicle's fastening needs.

• Simply thread onto compatible bolts or studs and tighten to manufacturer torque specifications.
• Ensure proper torque to achieve optimal clamping force and prevent over-tightening.

What's Included

• High-strength stainless steel nut kit with 12-point head design
• Polished finish for corrosion resistance and aesthetic appeal

Ideal For

• Performance enthusiasts seeking reliable, aerospace-grade fasteners
• Engine builders and mechanics requiring high-tensile nuts for critical applications
• Off-roaders and daily drivers needing corrosion-resistant hardware
• Custom automotive projects where strength and durability are paramount