Coilhose Pneumatics 581A 3/8 Inch Brass Pneumatic Coupler

Product Description

The COILHOSE PNEUMATICS 581A is a brass pneumatic hose coupler designed for compressed air and pneumatic tool connections in industrial and commercial service environments. This coupler features a 3/8-inch male NPT threaded inlet and a 3/8-inch body diameter, with a rated maximum working pressure of 300 psi and an operating temperature range of -40 degrees F to 250 degrees F. The Industrial Interchange design ensures broad compatibility with standard shop-air setups. Plumbers, pipefitters, and industrial maintenance technicians install this type of coupler when connecting pneumatic hose assemblies to air tools, regulators, and distribution lines.

The 581A is suited for residential shop air systems, light industrial facilities, and commercial maintenance environments where Industrial Interchange-style quick-connect fittings are the shop standard. Its brass construction resists corrosion and holds up under repeated connect-disconnect cycles. The threaded NPT connection allows for a secure, leak-resistant joint when properly applied with thread sealant. Typical applications include air compressor outlet connections, pneumatic tool drops, and inline hose assembly terminations.

Key Features

• 3/8-inch MNPT threaded connection for secure, leak-resistant installation
• 3/8-inch body diameter in Industrial Interchange configuration
• Rated to 300 psi maximum working pressure
• Operating range of -40 degrees F to 250 degrees F for broad service conditions
• Brass body construction for corrosion resistance and durability
• Industrial Interchange design compatible with standard shop-air quick-connect systems

Compatibility

Designed as an OEM-style replacement or new-installation coupler for pneumatic hose systems using Industrial Interchange style quick-connect fittings with 3/8-inch NPT threaded connections.

Installation Notes

Installation of pneumatic hose couplers should be performed by a qualified technician following the compressed air system manufacturer guidelines. Depressurize and isolate the air line completely before removing or installing any coupler. Apply an appropriate thread sealant or PTFE tape to the male NPT threads before torquing into the mating fitting. Verify all connections are leak-free before returning the system to service.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.