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The MIDLAND INDUSTRIES 28588B is a brass male plug designed for ARO 210 interchange pneumatic quick-connect systems. It features a 1/4-inch body with a Male ARO 210 profile on one end and a 3/8-inch Male NPT thread on the other, allowing direct connection to standard threaded fittings in compressed air lines. Rated to a maximum operating pressure of 250 psi, this plug is built for reliable performance in industrial and commercial pneumatic circuits. Its all-brass construction offers corrosion resistance and durability in demanding shop and field environments. HVAC technicians, plumbers, and industrial maintenance professionals commonly install this type of fitting when connecting pneumatic tools and equipment.
The 28588B is used in pneumatic systems that follow the ARO 210 interchange standard, one of the most widely adopted quick-connect profiles in industrial and trade applications. It is suited for compressed air service in light to medium industrial settings, tool rooms, service bays, and mechanical rooms. The 3/8-inch Male NPT connection threads directly into standard pipe fittings, manifolds, or tool inlet ports, making it a straightforward adapter in mixed-fitting pneumatic assemblies.
Designed for use with ARO 210 interchange quick-connect couplers in standard compressed air pneumatic systems.
Installation is typically performed by qualified mechanics, pipefitters, or HVAC technicians working on pneumatic systems. Always depressurize and bleed the compressed air line completely before removing or installing any fittings. Apply thread sealant appropriate for pneumatic service to the NPT threads before assembly. Verify that system pressure does not exceed the 250 psi rating of this fitting.
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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