AutoMeter AN Fitting

2010–2025 Universal Fitment for Automotive Gauges and Pressure Senders

Part #: 3278

Overview

The AutoMeter AN Fitting (3278) is a high-quality, precision-engineered component designed to facilitate reliable connections between braided stainless steel lines and AutoMeter gauges or pressure senders. Whether you're customizing your performance vehicle or upgrading your existing setup, this fitting ensures a secure and leak-free connection for your pressure and fluid monitoring needs.

Ideal for automotive enthusiasts, racers, and DIY mechanics, this fitting provides a durable and versatile solution for integrating various fluid lines with AutoMeter instrumentation. Its robust construction and precise threading help support consistent performance, making it a valuable addition to any custom or factory-installed gauge system.

Key Features

AutoMeter's AN Fitting (3278) offers several technical advantages designed to enhance your vehicle's instrumentation setup:

• High-Quality Materials: Manufactured from durable aluminum, this fitting combines lightweight strength with excellent corrosion resistance, ensuring long-lasting performance in demanding environments.
• Precise Machining: The 1/8" NPT female to -4AN male configuration is machined to exact specifications, providing a tight, secure fit that prevents leaks and maintains pressure integrity.
• 90-Degree Design: The 90-degree angle allows for flexible routing of braided lines, reducing stress on fittings and improving installation aesthetics.
• Compatibility: Designed specifically to connect #4 (-4AN) braided stainless steel lines to AutoMeter mechanical gauges and electric pressure gauge senders, ensuring seamless integration with your existing setup.
• Ease of Installation: The fitting's standard threading and high-quality construction make it straightforward to install with common tools, saving you time and effort during your upgrade or repair process.
• Leak-Free Performance: Precision threading and high-quality materials help ensure a reliable, leak-proof connection under various operating conditions.

Construction & Design

This AutoMeter AN fitting is crafted from premium aluminum, offering a lightweight yet durable solution for fluid line connections. The 90-degree bend is designed to facilitate clean routing within tight engine bays or custom installations, minimizing line stress and potential wear points. The high-precision machining ensures a perfect fit with both the #4 braided stainless steel lines and AutoMeter gauges or senders, promoting a secure, leak-resistant seal. Its corrosion-resistant finish helps maintain appearance and functionality over time, even in harsh environments.

Installation & Fitment

The AutoMeter AN Fitting (3278) is a straightforward, bolt-on component that requires no special tools beyond standard wrenches. Its 1/8" NPT female thread easily mates with compatible pressure senders or fittings, while the -4AN male end connects to braided stainless steel lines. No cutting, drilling, or additional modifications are necessary, making it suitable for both professional installations and DIY projects. Proper torque and thread sealing techniques will ensure optimal performance and longevity.

• Compatible with #4 (-4AN) braided stainless steel lines
• Connects to AutoMeter mechanical gauges and electric pressure senders
• No additional tuning or adjustments required

What's Included

• AutoMeter AN Fitting (3278) – 1 piece
• Installation instructions (if applicable)

Ideal For

• Performance automotive enthusiasts
• Racers and track day drivers
• Custom gauge installations
• DIY mechanics upgrading fluid monitoring systems

Emissions Note

This product is designed for use in non-emissions-critical applications. Please verify compatibility with local regulations if used in vehicles subject to emissions testing.