Tube fittings need to handle system pressure and prevent leaks. Choosing unsuitable fittings or mixing incompatible parts can cause leaks and downtime. How do Swagelok and Parker compare, and are there reliable alternatives at a lower cost? This comparison focuses on Swagelok tube fittings and Parker A-LOK, the double-ferrule series. Parker CPI uses a single

Absolutely no, but they can be connected using the appropriate adapter. Compression and NPT threaded connections use different sealing methods and sizing conventions. Even when both are labeled 1/4 inch or 3/8 inch, their connection ends are not interchangeable.  In this article, “threaded fitting” mainly refers to NPT pipe threaded fittings, and the compression fittings

Pipe thread types include NPT, NPTF, BSPP, BSPT, metric, SAE and JIS connections. They differ in thread angle, taper, pitch, size designation and sealing method. Before selecting a fitting, you should identify all these features, not just the measured thread diameter. Different threads can sometimes engage for a few turns without forming a correct or