-12AN 90 Degree Female to Male Flare Union

Building custom fuel, oil, coolant or brake plumbing on your 1988-1998 Chevy/GMC C/K (OBS/GMT400) truck? This ColorFittings AN coupler works on 2WD C-series and 4WD K-series 1500, 2500 and 3500 pickups, plus GMT400 Suburban, Tahoe and Yukon builds.

This 90° female-to-male AN union adapter delivers a compact, true 37° flare connection for cleaner hose routing and better clearance in tight engine bays. CNC machined from 6061-T6 billet aluminum and finished with a durable anodized coating for corrosion resistance and long-term durability. Rated for high-pressure, high-temperature use with fuel (including E85, ethanol, and race fuel), oil, coolant, transmission, brake, and power steering systems.

Details

• Brand: ColorFittings
• Part type: AN coupler
• Part number: CF-FMS-12-090-000-PU (varies by option)
• Material: 6061-T6 billet aluminum, anodized finish

Choosing a color

This listing comes in 2 anodized colors: Purple, Black. The function and fit are the same in every color.

Which should I pick?

• Match the color to your other fittings for a clean, factory-look engine bay.
• Black or silver for a subtle look; red, blue or purple to make the plumbing stand out.

Fitment

• 1988-1998 Chevrolet C/K1500, C/K2500 & C/K3500 pickups (2WD and 4WD)
• 1988-1998 GMC Sierra C/K1500, C/K2500 & C/K3500 pickups (2WD and 4WD)
• GMT400 Suburban, Tahoe & Yukon builds

Fitment notes: This is a universal plumbing part, not a direct-fit factory replacement. Match the AN size and thread to your hose, line and component before ordering.

FAQ

Does it fit a 2WD (C) or 4WD (K) truck?
Both. AN plumbing parts are universal, so they fit any OBS C or K truck when the size and thread match your setup.

Is it in stock?
This part ships direct from ColorFittings. If it is out of stock, the listing shows Sold Out.

Not sure which size you need?
Call, text or email us with your engine, fuel or oil setup and the line size, and we will help you pick the right part.