ORFS Male x SAE O-Ring Boss Male 90° Compact Elbow

O-ring boss into the port, ORFS flat face out to the hose, at 90°. Two soft seals and no metal cone anywhere - the combination fitted to most late-model US and Japanese plant where leaks are not tolerated.

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

Watch: 90 ° Hydraulic Adaptors How They Work and the Importance of O'Rings

Thread Standards

• ORFS Male – SAE J1453 O-ring face seal. It seals on an O-ring sitting in the flat face groove, never on the thread.
• SAE O-Ring Boss Male (UNO/UNF) – SAE J1926 / ISO 11926 straight thread O-ring boss. It seals on an O-ring squeezed against the port spotface, not on the thread.

How to Choose

• Two different O-rings - a boss O-ring at the ORB end and a face O-ring at the ORFS end. Both must be present.
• The ORB thread and the ORFS size are often different on the same fitting, so check both.
• Neither end takes tape or sealant.

Technicians Advice

If this fitting seeps it is nearly always the boss O-ring, because that is the one pinched on installation. Lubricate it with clean system oil before winding in and make sure the port spotface is free of burrs.

Where You’ll Find It

• ORFS Male – High-pressure, high-vibration circuits on late-model excavators, drill rigs, crushers and forestry gear.
• 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

• ORFS Male – SAE J1453 / ISO 8434-3 O-ring face seal. Parker call this series Seal-Lok. Also written ORFS or flat face.
• 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.

📐Dimensions & thread sizes – every size in this range

← Swipe the table sideways to see every measurement →

Part code	A	B	H	S1	Material	Finish
ORM-UNM-90C-0907	9/16" ORFS	7/16" UNO	15.9mm	14.3mm	Mild steel	Plated finish
ORM-UNM-90C-0909	9/16" ORFS	9/16" UNO	19.1mm	14.3mm	Mild steel	Plated finish
ORM-UNM-90C-1107	11/16" ORFS	7/16" UNO	15.9mm	19.1mm	Mild steel	Plated finish
ORM-UNM-90C-1108	11/16" ORFS	1/2" UNO	17.5mm	19.1mm	Mild steel	Plated finish
ORM-UNM-90C-1109	11/16" ORFS	9/16" UNO	19.1mm	19.1mm	Mild steel	Plated finish
ORM-UNM-90C-1112	11/16" ORFS	3/4" UNO	23.8mm	19.1mm	Mild steel	Plated finish
ORM-UNM-90C-1114	11/16" ORFS	7/8" UNO	27.0mm	27.0mm	Mild steel	Plated finish
ORM-UNM-90C-1309	13/16" ORFS	9/16" UNO	19.1mm	19.1mm	Mild steel	Plated finish
ORM-UNM-90C-1312	13/16" ORFS	3/4" UNO	23.8mm	19.1mm	Mild steel	Plated finish
ORM-UNM-90C-1314	13/16" ORFS	7/8" UNO	27.0mm	27.0mm	Mild steel	Plated finish
ORM-UNM-90C-1317	13/16" ORFS	1.1/16" UNO	34.9mm	30.2mm	Mild steel	Plated finish
ORM-UNM-90C-1612	1" ORFS	3/4" UNO	23.8mm	27.0mm	Mild steel	Plated finish
ORM-UNM-90C-1614	1" ORFS	7/8" UNO	27.0mm	27.0mm	Mild steel	Plated finish
ORM-UNM-90C-1617	1" ORFS	1.1/16" UNO	34.9mm	27.0mm	Mild steel	Plated finish
ORM-UNM-90C-1912	1.3/16" ORFS	3/4" UNO	23.8mm	30.2mm	Mild steel	Plated finish
ORM-UNM-90C-1914	1.3/16" ORFS	7/8" UNO	27.0mm	30.2mm	Mild steel	Plated finish
ORM-UNM-90C-1917	1.3/16" ORFS	1.1/16" UNO	34.9mm	30.2mm	Mild steel	Plated finish
ORM-UNM-90C-1921	1.3/16" ORFS	1.5/16" UNO	41.3mm	36.5mm	Mild steel	Plated finish
ORM-UNM-90C-2317	1.7/16" ORFS	1.1/16" UNO	34.9mm	36.5mm	Mild steel	Plated finish
ORM-UNM-90C-2321	1.7/16" ORFS	1.5/16" UNO	41.3mm	36.5mm	Mild steel	Plated finish
ORM-UNM-90C-2726	1.11/16" ORFS	1.5/8" UNO	47.6mm	41.3mm	Mild steel	Plated finish
ORM-UNM-90C-2730	1.11/16" ORFS	1.7/8" UNO	54.0mm	47.2mm	Mild steel	Plated finish

Key: H centre to face, S1 hex across flats 2. 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)

Same Threads, Other Angles

🔗 Straight – same threads🔗 45° Compact – same threads

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