Air Line Hose Coupler Quick Release Female Male Fitting Connector Set Compressor

The P-series (prefix "P" in the variant name) is a standard-flow coupler suited for most pneumatic hand tools — nailers, staplers, blow guns, and spray guns. The S-series (prefix "S") has a larger internal bore for higher air flow, making it better for tools with greater CFM demand such as impact wrenches, die grinders, and sanders. Check your tool's CFM rating: if it exceeds roughly 5 CFM at 90 PSI, the S-series is the safer choice.

No. P-series plugs are only compatible with P-series sockets, and S-series plugs mate only with S-series sockets. The two series have different body diameters and collar geometries. Mixing series will result in a loose fit or no engagement at all. Make sure all fittings on a given air line share the same series designation.

The suffix describes the connection method on the non-coupler end of the fitting. "F" variants have an internal (female) NPT thread for screwing onto a male-threaded port on a compressor, manifold, or tool. "M" variants have an external (male) NPT thread for screwing into a female-threaded port. "H" and "P" variants use a barbed shank that pushes into flexible air hose and is typically secured with a hose clamp — "H" is the female-socket body and "P" is the male-plug body.

Measure the inner diameter (ID) of your flexible air hose, not the outer diameter. The three barb sizes available are 8mm (~5/16" ID), 10mm (~3/8" ID), and 12mm (~1/2" ID). A barb that is slightly larger than the hose ID will create a tighter seal; a barb that is smaller will leak under pressure. When in doubt, measure with calipers rather than relying on the hose's nominal label size.

The fittings carry a corrosion-resistant finish designed to handle the moisture present in typical compressed-air systems. For prolonged outdoor exposure or coastal environments with salt air, additional protection such as periodic lubrication or storage in a dry location is recommended. If your application involves continuous outdoor exposure, contact us to confirm the specific finish on your chosen variant before ordering.

Yes. NPT threads rely on thread engagement and a sealant to achieve an airtight joint — the taper alone is not sufficient for compressed-air pressures. Apply 2–3 wraps of PTFE (plumber's) tape clockwise around the male threads before assembly. Avoid over-tightening, which can crack the fitting body; hand-tight plus 1–2 turns with a wrench is typically sufficient for NPT connections in air service.

Working pressure varies by variant series and size. As a general guideline, P-series fittings in this size range are typically rated for up to 145 PSI (10 bar) and S-series for similar or higher ratings. Please refer to the variant-specific datasheet or contact us to confirm the rated pressure for your chosen size before use in high-pressure applications.