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The CERROBRASS 301-66 is a barbed push-on hose male connector designed for fluid transfer applications in plumbing, HVAC, and industrial systems. Machined from brass, this fitting features a 3/8-inch NPTF threaded male end and a 3/8-inch barb end that accepts compatible push-on hose. The NPTF thread form creates a pressure-tight seal through thread interference, reducing the need for additional thread sealant. Rated to 300 psi maximum working pressure and capable of handling temperatures from -40 degrees F to 212 degrees F, this connector suits a broad range of fluid and low-pressure pneumatic service conditions. Licensed plumbers, HVAC technicians, and pipefitters are the typical installers.
This fitting is suited for residential and light commercial plumbing, HVAC hydronic systems, compressed air lines, and general fluid handling where a threaded-to-hose transition is needed. The 3/8-inch barb accepts push-on hose of matching inside diameter, making it a practical solution for quick-connect hose assemblies. Its brass construction holds up well in water, air, and a range of compatible fluid service environments.
Designed as a standard OEM-style replacement or new-installation fitting for 3/8-inch inside diameter push-on hose assemblies requiring a 3/8-inch NPTF male threaded connection in plumbing and HVAC applications.
Installation should be performed by a licensed plumber or qualified HVAC technician. Shut off and depressurize the system before removing or installing any fittings. NPTF threads are designed to seal on thread engagement, but applying a compatible thread sealant tape or compound per local code requirements is common practice. Inspect the hose barb end for proper hose seating and secure with an appropriate clamp to prevent hose pullout under pressure.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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