ORFS Tube Nuts - Light

Replacement light series tube nuts for O-ring face seal tube assemblies.

Brand: Ayrtec – mild steel body with a plated finish, manufactured to the standards listed below.

Watch: Exploring Hydraulic Adaptors Part 1: Difference Between Branch Tee & Run Tee, Elbows Short and Long

Thread Standards

• ORFS Tube Nut - Light – the lighter-wall version of the O-ring face seal tube nut. It clamps the flanged tube end; the O-ring in the mating face does the sealing.

How to Choose

• This is a spare part, sold on its own so a damaged one does not mean replacing the whole assembly.
• Light and standard series nuts are not interchangeable. Check what is on the assembly.
• No seal in the nut. The face O-ring seals.

Technicians Advice

Compare the old nut to the new one across the flats and the flange bore before fitting. The two series look close enough to grab the wrong one in a hurry.

Where You’ll Find It

• ORFS Tube Nut - Light – lighter ORFS tube work on late-model machinery where the heavy nut is not needed.

Cross-Reference

• ORFS Tube Nut - Light – SAE J1453 face seal tube nut, light series. Check which series the existing nut is before ordering, because they are not interchangeable.

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.

📐Dimensions & thread sizes – every size in this range

← Swipe the table sideways to see every measurement →

Part code	Hex	Material	Finish
OLN-09	20.6mm	Mild steel	Plated finish
OLN-11	25.4mm	Mild steel	Plated finish
OLN-13	31.8mm	Mild steel	Plated finish
OLN-16	33.3mm	Mild steel	Plated finish
OLN-19	38.1mm	Mild steel	Plated finish
OLN-23	44.5mm	Mild steel	Plated finish
OLN-27	60.3mm	Mild steel	Plated finish

Key: Hex across flats. Measurements in millimetres unless shown otherwise. Thread columns show what each end mates with. Dimensions are nominal – check critical clearances against the part.

Downloads

📄 Thread Identification Chart (PDF)

Express shipping Australia-wide. We dispatch daily to New South Wales, Victoria, Queensland, Western Australia, South Australia, Tasmania, the Australian Capital Territory and the Northern Territory – Sydney, Melbourne, Brisbane, Perth, Adelaide, Hobart, Canberra and Darwin, plus regional and remote sites.

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