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Tube adapter, -12 AN male to 3/4-inch tube compression, black

Quick Overview

  • Adapter, -12 AN JIC male to 3/4 inch tube compression
  • Brass olive included, no flaring needed
  • Tube must be correct OD, smooth and clean
  • No tape or sealant needed
  • E85 compatible, black anodized 6061-T6 aluminum

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Item #: ADF-12HL34

$21.58

per EACH (USD)
This is an obsolete Item
 
 
 In Stock & Ready to Ship

Adapter, -12 AN JIC Male to 3/4" Tube Compression, Black

Joins 3/4" OD hard line to a -12 AN female hose end or fitting, with no flaring.

The Racetronix ADF-12HL34 connects 3/4" outside-diameter hard line to -12 AN plumbing. The compression end has an internal brass olive (included) that slips over the tube. When you tighten the compression nut, the olive compresses onto the tube to grip and seal it, so the tube does not need to be flared. The other end is a -12 AN JIC male (37° flare) that takes a -12 AN female hose end, swivel or coupler.

Key features

  • 3/4" tube compression end for hard line, no flaring tool needed.
  • Brass olive included. It compresses onto the tube as the nut is tightened.
  • -12 AN JIC male (37° flare) on the other end.
  • E85 compatible.
  • 6061-T6 aluminum, black anodized.
No tape or thread sealant

The compression end seals on the brass olive and the JIC end seals metal to metal on its 37° flare. Do not use Teflon tape or thread sealant on either end. Cut the tube square and remove any burrs before you fit it.

Specifications

Part numberADF-12HL34
JIC end-12 AN JIC male, 1-1/16"-12 thread, 37° flare
Tube end3/4" OD tube compression, brass olive included
Material6061-T6 aluminum, black anodized
Fuel compatibilityGasoline and E85

Lookup chart

Every part in this series. This part is highlighted. Click a column heading to sort by it; click again to reverse. On a phone, swipe the chart sideways.

Part numberAN JIC maleTube OD
ADF-3HL14-3 AN1/4"
ADF-4HL14-4 AN1/4"
ADF-6HL516-6 AN5/16"
ADF-6HL38-6 AN3/8"
ADF-8HL38-8 AN3/8"
ADF-8HL12-8 AN1/2"
ADF-10HL12-10 AN1/2"
ADF-10HL58-10 AN5/8"
ADF-12HL58-12 AN5/8"
ADF-12HL34-12 AN3/4"

Frequently asked questions

Do I need to flare the tube?

No. The brass olive grips and seals on the outside of the tube. Slip the nut and olive over the tube, cut the tube square, deburr it, push it fully into the fitting and tighten the compression nut.

What tube does it fit?

Hard line with a 3/4" outside diameter. Measure the outside of your tube, not the inside, and pick the matching size from the lookup chart.

Does the condition of the tube matter?

Yes. The olive can only seal on a tube of the correct outside diameter with a smooth, clean surface. Tube that is rusted, pitted, scratched or out of round where the olive sits will leak. Clean the end of the tube and replace any section that is not smooth.

Is it E85 compatible?

Yes. It is made from 6061-T6 aluminum and black anodized, and works with gasoline and E85.

Questions and support

Not sure which fitting your build needs? Email [email protected] before you order.

Racetronix provides technical support to verified customers through our support forum, not by phone or email. Please request forum access when you place your order so your account is approved before your parts arrive. The forum is moderated, open 24/7, and holds a knowledge base going back to 1999.

© 2026 Racetronix. All rights reserved. | Part No: ADF-12HL34 | Revision: Alpha