Low-Pressure Hose Tail – UNO Male – 90° Compact Elbow – Crimp-On

A low-pressure UNO male on a 90° compact crimp tail, where a return or drain line has to turn square out of an O-ring boss port.

Mild steel body with a plated finish, manufactured to the standard listed above.

This is the tail only – clamps are sold separately

Low-pressure tails are not crimped. They push into the hose and are held with a worm drive clamp over the barb. There is no ferrule and no crimp diameter to set.

• Cut the hose square and push it fully onto the barb, past the last serration.
• Position the clamp over the barbed section, not over the plain shank behind it.
• Nip it up until the hose swells slightly between the serrations. Over-tightening cuts the cover and starts a leak path.
• Two clamps on larger bores, spaced along the barb, on suction and return lines that see vibration.

Watch: How to Identify Hydraulic Hose Fittings and Hydraulic Adaptors JIC and BSP

Thread Standards

• SAE O-Ring Boss Male (UNO/UNF) – SAE J1926 / ISO 11926 straight thread O-ring boss, seals on an O-ring squeezed against the port spotface, not on the thread

How to Choose

• The bend is formed into the tail, so the angle is fixed. Decide which way the hose has to leave the port before you order – you cannot rotate it after it is crimped.
• Low-pressure duty only.
• An adjustable UNO male lets you clock the bend, then lock it with the nut and washer.

Technicians Advice

Wind it in until the washer touches, back it off to the angle you want, then hold the body still and tighten the locknut. Turning the body while you lock it is what rolls the O-ring.

Where You’ll Find It

• SAE O-Ring Boss Male (UNO/UNF) – Cylinder end caps, pump and valve bosses on US-built plant. Common on Australian-assembled cylinders too, where it is usually called UNO.

Cross-Reference

• SAE O-Ring Boss Male (UNO/UNF) – SAE J1926 / ISO 11926 straight thread O-ring boss. Also written ORB, SAE ORB or UNO. Thread form is UN/UNF.

Parker, Gates, Aeroquip and Ryco all manufacture to these same standards under their own part numbering, so a fitting built to the standard above will mate with theirs.

Cross-references are given at series level as a guide to the standard, not as a part-for-part substitution. Always confirm the thread form, size and seal type against the port before ordering.

What “low pressure” means here

• These tails are built for the low-pressure side of a system – return lines, case drains, suction lines and tank lines.
• They are not a substitute for a braided-hose pressure tail. If the line sees pump pressure, use a two-piece tail on 1‑wire or 2‑wire hose instead.
• The working pressure of the finished assembly is set by the lowest-rated part in it – usually the hose. Check the hose rating and match the tail to it, not the other way round.
• Suction and return lines run at low pressure but move a lot of oil. Size on bore and flow, not on the thread you happen to have spare.

Downloads

📄 Thread Identification Chart (PDF)

Same Threads, Other Angles

🔗 Straight – same threads

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Ayrtec two-piece crimp-on hose tails, stocked and dispatched by Hydraulic.Online.

Need a hand? Call 1300 146 737 or email sales@mhfgc.com.au – real technicians, real answers.