Metric to AN Adapter

OEM hardware speaks metric; your plumbing speaks AN; someone has to translate.

OEM blocks, pumps, and coolers the world over speak metric bungs, and this billet 6061 aluminum adapter, CNC machined with strong threads, translates them to AN. The Finish Line Factory Metric to AN Adapter carries a male metric thread on one side and a male 37 degree AN flare on the other, in AN sizes 3AN, 4AN, 6AN, 8AN, 10AN, 12AN with port sizes M10 x 1.00, M10 x 1.25, M10 x 1.50, M12 x 1.00, M12 x 1.25, M18 x 1.50, M6 x 1.00, M8 x 1.00, M8 x 1.25, M12 x 1.50, M14 x 1.25, M14 x 1.50, M12 x 1.50 (O-Ring), M16 x 1.50, M20 x 1.50, M22 x 1.50, M24 x 1.50. Ideal for fuel, oil, water, and air delivery, and for keeping the whole downstream system in one connection standard.

Benefits

• The odd port joins the AN system instead of dictating its own island of plumbing
• Sealing happens the way this thread standard actually works, not the way NPT habits assume
• Downstream, everything is familiar flares and familiar wrenches
• One correct adapter replaces a drawer of near-miss attempts

Features

• Port side: male metric thread, sizes M10 x 1.00, M10 x 1.25, M10 x 1.50, M12 x 1.00, M12 x 1.25, M18 x 1.50, M6 x 1.00, M8 x 1.00, M8 x 1.25, M12 x 1.50, M14 x 1.25, M14 x 1.50, M12 x 1.50 (O-Ring), M16 x 1.50, M20 x 1.50, M22 x 1.50, M24 x 1.50
• AN side: male 37 degree flare, 3AN, 4AN, 6AN, 8AN, 10AN, 12AN
• Seals via the crush washer or o-ring appropriate to the metric bung
• Suits fuel, oil, water, and air delivery
• Sold as a single fitting

The Details

Thread standards differ in exactly one place that matters: where the seal lives. Here it lives at the crush washer or o-ring appropriate to the metric bung, while the AN side stays a dry metal-to-metal flare, no sealant ever. Metric bungs vary between washer-sealed and o-ring-sealed; the M12x1.5 (O-Ring) variant is called out explicitly. Match pitch exactly. Assemble the port side first, confirm it holds, then bring the AN plumbing to it with the body backed up by an aluminum wrench. When a port's identity is uncertain, measure before ordering: thread pitch gauges and calipers cost less than a stripped component, and the difference between tapered and parallel is visible in profile.

Kit Includes

• 1x Metric to AN Adapter (size per your selection)

Applications

• Port sizes: M10 x 1.00, M10 x 1.25, M10 x 1.50, M12 x 1.00, M12 x 1.25, M18 x 1.50, M6 x 1.00, M8 x 1.00, M8 x 1.25, M12 x 1.50, M14 x 1.25, M14 x 1.50, M12 x 1.50 (O-Ring), M16 x 1.50, M20 x 1.50, M22 x 1.50, M24 x 1.50; AN sizes: 3AN, 4AN, 6AN, 8AN, 10AN, 12AN
• Common uses: adapting OEM and specialty ports to AN plumbing on fuel, oil, coolant, and air systems
• Mates to female AN hose ends in the matching size downstream