JIC vs SAE ORB Fittings: Seal Type, Port Design & When to Use Each

The key difference: JIC seals metal-to-metal at the 37-degree flare cone. Full breakdown below.

JIC uses a 37-degree flare cone with straight threads for tube connections. SAE ORB (O-Ring Boss) uses straight threads with an O-ring that seals against a machined boss face. They serve different roles: JIC connects tubes and hoses, while SAE ORB is primarily a port connection standard.

Key Differences

JIC seals metal-to-metal at the 37-degree flare cone.

SAE ORB seals with an elastomeric O-ring compressed against a flat machined boss surface.

JIC is a tube/hose end connection.

SAE ORB is typically a port connection on valves, pumps, and manifolds.

Both use straight (non-tapered) threads, but the sealing mechanism is completely different.

SAE ORB provides a more reliable seal with less torque sensitivity than JIC.

When to Choose JIC (SAE J514)

Tube-to-tube and hose-to-tube connections

Field repairs where flared tubing is standard

Applications where metal-to-metal sealing is acceptable

Systems already using JIC throughout.

When to Choose SAE ORB (O-Ring Boss)

Port connections on hydraulic components (valves, pumps, motors, cylinders)

Applications requiring zero-leak performance

Systems subject to vibration

Applications requiring repeated assembly and disassembly

New hydraulic system design.

Practical Notes

Many hydraulic systems use both standards together: SAE ORB at the component ports and JIC on the hose/tube connections between components. This is common and considered best practice. The SAE ORB port provides a reliable, vibration-resistant seal at the component, while JIC provides a reassemblable connection at the hose end.

Common Mistake

Confusing SAE ORB straight threads with JIC straight threads. Both are straight, but SAE ORB has no flare, the O-ring does all the sealing. Installing a JIC fitting into an ORB port without the correct adapter will leak.