​Why You Should Never Mix Metric and Nominal Threads

Mixing nominal thread types like NPT with metric-based thread systems is never recommended. These threads differ in pitch, angle, and sealing method, and even small mismatches can cause cross-threading or immediate leakage. To maintain safety and performance, a hydraulic or pneumatic system should always operate with a consistent thread standard throughout the entire assembly.

This is why most engineers rely on thread adapters to unify mixed systems. Instead of forcing incompatible threads together, adapters act as the bridging component, converting one thread style into another while preserving seal integrity. Titan Fittings offers a complete lineup of conversion adapters including NPT to BSPP adapters, metric to JIC adapters, and ORB thread adapters for O-ring sealing applications.

Using proper adapters ensures that every connection across your system or machine shares a common, consistent thread. This not only prevents thread damage and downtime but also simplifies maintenance and future upgrades. Whether you are standardizing on NPT, ORB, BSPP, or JIC, Titan Fittings carries industry-leading stainless and carbon steel options to help you build a unified, leak-free system. Explore the full range of hydraulic thread adapters to configure your system correctly from the start.