How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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High-Pressure Brass Threaded Pipe Fittings
These fittings have the strength to handle high-pressure applications. They are brass for good corrosion resistance.
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through a wall or panel to create an inlet or outlet.

- For Use With:
NPT Threads: Air, Water
NPTF, BSPP and Metric Threads: Air, Natural Gas, Oil, Water - Specifications Met: See table
Miniature High-Pressure Brass Threaded Pipe Fittings
When space in your pipe line is limited, choose these miniature fittings that are one inch or less in length. They are brass, which has good corrosion resistance.
Nickel-plated brass fittings offer better corrosion resistance than unplated brass.
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
UN/UNF (SAE Straight) threads are also known as O-ring boss threads. Male threads with a gasket protect against leaks.