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AN flare plug, 37-degree male AN plug for sealing female AN hose ends - Hot Rod AN
  • AN flare plug, 37-degree male AN plug for sealing female AN hose ends - Hot Rod AN
AN, NPT, and ORB fitting caps and plugs

AN, NPT, and ORB fitting caps and plugs

$4.99 USD
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Seal ports & cap AN hose ends—clean, leak-free, and professional

Precision-machined aluminum caps & plugs for the three most common standards in performance plumbing: 37° AN flare, SAE O-Ring Boss (ORB), and NPT tapered pipe. Perfect for mockup, storage, troubleshooting, or permanent block-offs on EFI fuel systems, coolers, and accessories.

Choose the right piece

  • AN Flare Cap (female): caps a male AN flare on a hose end, regulator, or rail.
  • AN Flare Plug (male): plugs a female AN hose end or female AN port.
  • ORB Plug: straight-thread port plug that seals with an O-ring in ORB ports on rails, filters, and regulators.
  • NPT Plug: tapered pipe plug for NPT ports (use a fuel-safe thread sealant).

Sizes in stock

  • AN: -6AN, -8AN, -10AN
  • ORB: ORB-6, ORB-8, ORB-10
  • NPT: 1/4" NPT, 3/8" NPT, 1/2" NPT

Specs & standards

Type Thread standard Seals at Sealant? Typical use
AN Flare Cap (female) 37° AN (JIC) Metal-to-metal flare No Cap male AN hose ends / ports
AN Flare Plug (male) 37° AN (JIC) Metal-to-metal flare No Plug female AN hose ends / ports
ORB Plug SAE ORB (straight thread) O-ring face No (replace O-ring if worn) Plug fuel rails, filters, regulators
NPT Plug NPT (tapered pipe) Thread flanks (taper) Yes – fuel-safe sealant Block pipe ports on pumps, tanks, etc.

Why Hot Rod AN

  • Black anodized aluminum, clean look and corrosion resistance
  • Precision threads for repeatable, leak-free sealing
  • Builder-approved for street, strip, off-road & marine

Install tips

  • AN & ORB: no thread sealant on the threads; AN seals at the 37° flare, ORB seals at the O-ring.
  • NPT: apply a fuel-safe sealant; snug and check for orientation—don’t over-torque.
  • Not for brake or power steering use.

Helpful resources

Pair with

FAQ

Do I need thread sealant?

AN & ORB: no sealant on the threads. NPT: use a fuel-safe sealant or tape.

Cap vs. plug—what’s the difference?

Cap is female and goes over a male fitting; plug is male and goes into a female fitting.

What material/finish are these?

Black anodized aluminum for clean looks and corrosion resistance.

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