What is the purpose of a reducer adapter fitting like this?

This fitting is used to connect two AN-style fittings of different sizes. In this case, it allows you to adapt a -16AN hose or component to a -10AN port, or vice versa, creating a secure and leak-free connection.

What does the 'AN' size mean?

AN stands for Army-Navy standard. The number following 'AN' (like -10 or -16) refers to the size of the fitting in sixteenths of an inch. So, -10AN is 10/16ths of an inch and -16AN is 16/16ths of an inch (or 1 inch).

What is the warranty on this Vibrant Performance fitting?

This Vibrant Performance reducer adapter fitting comes with a one-year limited warranty from the manufacturer.

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Specifications

Brand: Vibrant
Part #: 10439
UPC: 690092145729

Vibrant -16AN to -10AN Reducer Adapter Fitting - Aluminum

Name: Vibrant -16AN to -10AN Reducer Adapter Fitting - Aluminum
Brand: Vibrant
SKU: vibrant-vibrant-16an-to-10an-reducer-adapter-fitting-aluminum-t14-4310220
Price: 26.24 USD
Availability: BackOrder

$26.24

On Backorder — Expected to ship by Jun 21, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Vibrant -16AN to -10AN reducer adapter fitting. Made from lightweight 6061 aluminum for reliable connections.

Key Features

Fits -16AN to -10AN connections.
Constructed from lightweight 6061 aluminum alloy.
Features a black anodized finish for corrosion resistance.
Designed for smooth flow and an anti-leak seal.
Suitable for connecting to common oil pumps, fuel pumps, and fuel filters.
Backed by a one-year limited warranty.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

This Vibrant Performance reducer adapter fitting is machined from 6061 aluminum alloy, a material chosen for its light weight and good strength. It allows you to connect a -10AN hose or fitting to a -16AN port, which is common when adapting different size fuel or oil lines in custom setups.

The adapter features male AN flare ends, designed to create a smooth flow path and an anti-leak seal when properly assembled. Its anodized black finish helps protect the aluminum from corrosion and gives it a clean look in your engine bay. This fitting is suitable for various components like fuel pumps, oil pumps, and fuel filters.