Tube Fittings

Tube fittings connect and seal tubing throughout instrumentation, process, and pneumatic systems, and the right design, compression, flareless, or barbed, depends on the pressure, media, and how often the connection needs to be serviced. This general tube fitting category is the starting point for the more specific fitting series carried elsewhere in this catalog.

Selecting the right tube fitting family up front makes it easier to standardize spares and maintenance across a facility. These fittings are suitable for new tubing installations, panel builds, and maintenance replacement across instrumentation and process systems.

Shop Relevant carries tube fittings across A-Lok, CPI, MPI, ISO, and other series, along with general purpose compression and barbed configurations for lower pressure applications. Ships same day.

Frequently Asked Questions

How do I know which tube fitting series to choose?

Consider the pressure and media of your application along with whether you need to standardize on an existing fitting series already used in your facility, then choose from the specific series, such as A-Lok, CPI, or MPI, that matches those requirements.

Can different tube fitting brands be mixed on the same system?

It is generally safer to standardize on one compatible fitting series per tubing run, since ferrule and body dimensions can vary enough between brands to affect sealing reliability.

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