Hydraulic Fitting Comparisons

Compare hydraulic fitting standards side by side. JIC vs NPT, BSP vs NPT, ORFS vs JIC with thread differences, seal types, and pressure ratings.

The most common fitting identification mistake is confusing JIC with NPT. Both are North American standards with similar sizing conventions, but JIC uses straight threads with a 37-degree flare seal while NPT uses tapered threads that seal by thread interference. They cannot be interchanged. Cross-threading JIC into NPT (or vice versa) damages the fitting and will leak under pressure.

The second most common mistake is confusing BSP with NPT. Both are pipe thread standards, but the thread angle differs (55 degrees for BSP vs 60 degrees for NPT). At 1/2 inch nominal size, both standards share the same 14 TPI pitch, making them easy to cross-thread. A thread pitch gauge alone will not distinguish them at that size. You need to check the thread OD or use a standard-specific gauge.

Each comparison below covers the specific thread differences, seal methods, pressure ratings, and the practical situations where each standard is the correct choice.

All Comparisons

Not Sure What You Have?

If you cannot identify the fitting standard yet, start with the fitting identification guide. It walks through the measurement sequence: thread OD, pitch count, seat angle, and standard matching. Once you know the standard, come back here to compare it against other options.