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Vibrant
Vibrant 16818 -3AN Male Flare to -4 ORB Male Straight Adapter w/O-Ring

Vibrant 16818 -3AN Male Flare to -4 ORB Male Straight Adapter w/O-Ring

Best price now

$24.84at eBayObserved at 5:04 AM

Compared across 2 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission.

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Price facts

  • Lowest price today: $24.84 at eBay (checked Nov 9, 2026).
  • Checked at 2 stores.

Our take on the Vibrant 16818 -3AN Male Flare to -4 ORB Male Straight Adapter w/O-Ring

This is a straight adapter that joins a 3AN male flare fitting to a 4 ORB (O-ring boss) male port, with an O-ring included for the ORB side. It is machined from 6061 aluminum with a black anodized finish, which resists corrosion and suits fuel, oil and coolant lines. It suits anyone plumbing an oil system, fuel system or transmission cooler who needs to step between AN flare and ORB threads in one compact piece. Against generic brass or steel adapters it is lighter and matches other black anodized AN hardware, though it is not rated for high-pressure hydraulic use.

Best forOil system and cooler plumbingFuel system buildsTransmission cooler linesMatching black anodized AN hardware
Pros
  • 6061 aluminum keeps weight low
  • Black anodized finish resists corrosion
  • O-ring included for the ORB side
  • Compact straight body fits tight spaces
  • Single piece replaces stacked adapters
Cons
  • Not for high-pressure hydraulic systems
  • Aluminum threads are easier to cross-thread than steel
  • Anodized coating can scratch during installation
  • Only one size combination, no swivel joint

Vibrant 16818 -3AN Male Flare to -4 ORB Male Straight Adapter w/O-Ring prices at every store

  • eBayNew

    Availability unknownSold by jjboy925 (100% positive, 46,800 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $24.84Free shippingObserved at 5:04 AM
    Visit eBay
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $27.32Free shippingObserved at 5:04 AM
    Visit Amazon

Store links may earn us a commission.

Vibrant 16818 -3AN Male Flare to -4 ORB Male Straight Adapter w/O-Ring price history

Lowest price we've seen: $27.32 on Nov 9 at Amazon. Tracked across 1 store since Nov 9.

Specifications

AN Size
-3
Finish
Black Anodized
Material
6061 Aluminum
ORB Size
-4

Questions and answers

What does -3AN to -4 ORB mean?
The -3AN side is a 37-degree male flare for 3/16 inch (3AN) hose ends. The -4 ORB side is a 7/16-20 O-ring boss port thread, common on oil pumps, filters and coolers.
Is the O-ring included?
Yes. The adapter ships with an O-ring for the ORB end, which seals against the port face rather than on the threads.
Can I use it for brake lines?
No. It is intended for oil, fuel and coolant plumbing. Brake systems need components rated for that pressure and fluid.
Will it fit my oil cooler?
Only if the cooler has a -4 ORB port and your line ends in a 3AN female flare. Check both thread sizes before ordering.
What is it made of?
6061 aluminum with a black anodized finish. It is light and corrosion resistant but softer than steel.
Where is the Vibrant 16818 -3AN Male Flare to -4 ORB Male Straight Adapter w/O-Ring cheapest?
At eBay, for $24.84, as of our latest check.
Where can I buy the Vibrant 16818 -3AN Male Flare to -4 ORB Male Straight Adapter w/O-Ring?
2 stores we checked sell it, including Amazon, eBay.

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Buying guides that pick the Vibrant 16818 -3AN Male Flare to -4 ORB Male Straight Adapter w/O-Ring

  • Best AN ORB fuel line fittings