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The Aeromotive AN-04 O-Ring Boss / 5/16 inch Hose Barb Adapter Fitting is designed for high-performance fuel systems, providing superior flow and reliable sealing. Crafted from durable 6061 T6 aircraft-grade aluminum, this fitting features CNC-machined precision to ensure a perfect fit and optimal flow characteristics. The anodized Type II bright dip black finish offers excellent corrosion resistance while enhancing aesthetic appeal. This adapter seamlessly connects 5/16 inch fuel hose to AN-04 O-ring boss fittings, making it suitable for a wide range of automotive applications involving gasoline and alcohol-based fuels. Its smooth transition from inlet to outlet minimizes flow restriction, contributing to improved fuel delivery efficiency and system performance. The Aeromotive line of fittings is recognized for quality, durability, and performance, making this component an ideal choice for custom fuel system setups and upgrades. Whether you're building a race car, restoring a classic, or upgrading your fuel delivery, this fitting ensures a secure, leak-free connection with uncompromised fuel flow. Compatibility with automotive standards and compatibility with various fuel types make it a versatile addition to your fuel system components.
Features:
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
