O-Ring Boss Fittings

Browse our selection of O-Ring Boss (ORB) fittings, designed with an SAE straight thread and an elastomeric O-ring to create a secure, leak-free hydraulic seal. Ideal for high-pressure applications, ORB fittings are a trusted choice across mobile and industrial hydraulic systems.

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What are ORB Fittings?
ORB (O-Ring Boss) fittings use an SAE straight thread (UN/UNF) combined with an O-ring to seal against a flat surface in the port. This design eliminates thread sealants and provides a reliable, vibration-resistant connection, even under high pressure.

Commonly used in construction machinery, agricultural equipment, forestry, manufacturing plants, and industrial hydraulics, ORB fittings are valued for their ability to maintain leak-free performance with frequent assembly and disassembly.

At TR Hydraulics, we stock a wide range of straight, elbow, and adapter ORB fittings, precision-machined for durability and compatibility with standard SAE J1926 ports.

Order online today for fast shipping across Canada, or contact us for bulk orders, cross-references, and sizing support.